Codechange: rename SettingGuiFlag to SettingFlag (#9332)

It is a lovely organicly grown enum, where it started off with
GUI-only flags, and after that a few flags got added that can be
considered GUI-only (the GUI disables/enables based on them), to
only have flags added that has nothing to do with the GUI.

So be less confusing, and rename them to what they do.

Additionally, I took this opportunity to rename 0ISDISABLED to
reflect what it really does.

10 files changed, 219 insertions, 220 deletions

diff --git a/src/settings.cpp b/src/settings.cpp
index 619d762d2..aa1e915f8 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -386,9 +386,9 @@ void IntSettingDesc::MakeValueValidAndWrite(const void *object, int32 val) const
  * Make the value valid given the limitations of this setting.
  *
  * In the case of int settings this is ensuring the value is between the minimum and
- * maximum value, with a special case for 0 if SGF_0ISDISABLED is set.
+ * maximum value, with a special case for 0 if SF_GUI_0_IS_SPECIAL is set.
  * This is generally done by clamping the value so it is within the allowed value range.
- * However, for SGF_MULTISTRING the default is used when the value is not valid.
+ * However, for SF_GUI_DROPDOWN the default is used when the value is not valid.
  * @param val The value to make valid.
  */
 void IntSettingDesc::MakeValueValid(int32 &val) const
@@ -407,8 +407,8 @@ void IntSettingDesc::MakeValueValid(int32 &val) const
 		case SLE_VAR_U16:
 		case SLE_VAR_I32: {
 			/* Override the minimum value. No value below this->min, except special value 0 */
-			if (!(this->flags & SGF_0ISDISABLED) || val != 0) {
-				if (!(this->flags & SGF_MULTISTRING)) {
+			if (!(this->flags & SF_GUI_0_IS_SPECIAL) || val != 0) {
+				if (!(this->flags & SF_GUI_DROPDOWN)) {
 					/* Clamp value-type setting to its valid range */
 					val = Clamp(val, this->min, this->max);
 				} else if (val < this->min || val > (int32)this->max) {
@@ -421,8 +421,8 @@ void IntSettingDesc::MakeValueValid(int32 &val) const
 		case SLE_VAR_U32: {
 			/* Override the minimum value. No value below this->min, except special value 0 */
 			uint32 uval = (uint32)val;
-			if (!(this->flags & SGF_0ISDISABLED) || uval != 0) {
-				if (!(this->flags & SGF_MULTISTRING)) {
+			if (!(this->flags & SF_GUI_0_IS_SPECIAL) || uval != 0) {
+				if (!(this->flags & SF_GUI_DROPDOWN)) {
 					/* Clamp value-type setting to its valid range */
 					uval = ClampU(uval, this->min, this->max);
 				} else if (uval < (uint)this->min || uval > this->max) {
@@ -743,13 +743,13 @@ void IniSaveWindowSettings(IniFile *ini, const char *grpname, void *desc)
  */
 bool SettingDesc::IsEditable(bool do_command) const
 {
-	if (!do_command && !(this->save.conv & SLF_NO_NETWORK_SYNC) && _networking && !_network_server && !(this->flags & SGF_PER_COMPANY)) return false;
-	if ((this->flags & SGF_NETWORK_ONLY) && !_networking && _game_mode != GM_MENU) return false;
-	if ((this->flags & SGF_NO_NETWORK) && _networking) return false;
-	if ((this->flags & SGF_NEWGAME_ONLY) &&
+	if (!do_command && !(this->save.conv & SLF_NO_NETWORK_SYNC) && _networking && !_network_server && !(this->flags & SF_PER_COMPANY)) return false;
+	if ((this->flags & SF_NETWORK_ONLY) && !_networking && _game_mode != GM_MENU) return false;
+	if ((this->flags & SF_NO_NETWORK) && _networking) return false;
+	if ((this->flags & SF_NEWGAME_ONLY) &&
 			(_game_mode == GM_NORMAL ||
-			(_game_mode == GM_EDITOR && !(this->flags & SGF_SCENEDIT_TOO)))) return false;
-	if ((this->flags & SGF_SCENEDIT_ONLY) && _game_mode != GM_EDITOR) return false;
+			(_game_mode == GM_EDITOR && !(this->flags & SF_SCENEDIT_TOO)))) return false;
+	if ((this->flags & SF_SCENEDIT_ONLY) && _game_mode != GM_EDITOR) return false;
 	return true;
 }
 
@@ -759,7 +759,7 @@ bool SettingDesc::IsEditable(bool do_command) const
  */
 SettingType SettingDesc::GetType() const
 {
-	if (this->flags & SGF_PER_COMPANY) return ST_COMPANY;
+	if (this->flags & SF_PER_COMPANY) return ST_COMPANY;
 	return (this->save.conv & SLF_NOT_IN_SAVE) ? ST_CLIENT : ST_GAME;
 }
 
@@ -1689,7 +1689,7 @@ void IntSettingDesc::ChangeValue(const void *object, int32 newval) const
 	this->Write(object, newval);
 	if (this->post_callback != nullptr) this->post_callback(newval);
 
-	if (this->flags & SGF_NO_NETWORK) {
+	if (this->flags & SF_NO_NETWORK) {
 		GamelogStartAction(GLAT_SETTING);
 		GamelogSetting(this->name, oldval, newval);
 		GamelogStopAction();
@@ -1833,7 +1833,7 @@ CommandCost CmdChangeCompanySetting(TileIndex tile, DoCommandFlag flags, uint32
 bool SetSettingValue(const IntSettingDesc *sd, int32 value, bool force_newgame)
 {
 	const IntSettingDesc *setting = sd->AsIntSetting();
-	if ((setting->flags & SGF_PER_COMPANY) != 0) {
+	if ((setting->flags & SF_PER_COMPANY) != 0) {
 		if (Company::IsValidID(_local_company) && _game_mode != GM_MENU) {
 			return DoCommandP(0, 0, value, CMD_CHANGE_COMPANY_SETTING, nullptr, setting->name);
 		}
@@ -1992,7 +1992,7 @@ void IConsoleGetSetting(const char *name, bool force_newgame)
 		sd->FormatValue(value, lastof(value), object);
 		const IntSettingDesc *int_setting = sd->AsIntSetting();
 		IConsolePrintF(CC_WARNING, "Current value for '%s' is: '%s' (min: %s%d, max: %u)",
-			name, value, (sd->flags & SGF_0ISDISABLED) ? "(0) " : "", int_setting->min, int_setting->max);
+			name, value, (sd->flags & SF_GUI_0_IS_SPECIAL) ? "(0) " : "", int_setting->min, int_setting->max);
 	}
 }
 
diff --git a/src/settings_gui.cpp b/src/settings_gui.cpp
index f038617d1..1bd58c13b 100644
--- a/src/settings_gui.cpp
+++ b/src/settings_gui.cpp
@@ -1147,7 +1147,7 @@ bool SettingEntry::UpdateFilterState(SettingFilter &filter, bool force_visible)
 
 static const void *ResolveObject(const GameSettings *settings_ptr, const IntSettingDesc *sd)
 {
-	if ((sd->flags & SGF_PER_COMPANY) != 0) {
+	if ((sd->flags & SF_PER_COMPANY) != 0) {
 		if (Company::IsValidID(_local_company) && _game_mode != GM_MENU) {
 			return &Company::Get(_local_company)->settings;
 		}
@@ -1166,13 +1166,13 @@ void SettingEntry::SetValueDParams(uint first_param, int32 value) const
 	if (this->setting->IsBoolSetting()) {
 		SetDParam(first_param++, value != 0 ? STR_CONFIG_SETTING_ON : STR_CONFIG_SETTING_OFF);
 	} else {
-		if ((this->setting->flags & SGF_MULTISTRING) != 0) {
+		if ((this->setting->flags & SF_GUI_DROPDOWN) != 0) {
 			SetDParam(first_param++, this->setting->str_val - this->setting->min + value);
-		} else if ((this->setting->flags & SGF_DISPLAY_ABS) != 0) {
+		} else if ((this->setting->flags & SF_GUI_NEGATIVE_IS_SPECIAL) != 0) {
 			SetDParam(first_param++, this->setting->str_val + ((value >= 0) ? 1 : 0));
 			value = abs(value);
 		} else {
-			SetDParam(first_param++, this->setting->str_val + ((value == 0 && (this->setting->flags & SGF_0ISDISABLED) != 0) ? 1 : 0));
+			SetDParam(first_param++, this->setting->str_val + ((value == 0 && (this->setting->flags & SF_GUI_0_IS_SPECIAL) != 0) ? 1 : 0));
 		}
 		SetDParam(first_param++, value);
 	}
@@ -1205,13 +1205,13 @@ void SettingEntry::DrawSetting(GameSettings *settings_ptr, int left, int right,
 	if (sd->IsBoolSetting()) {
 		/* Draw checkbox for boolean-value either on/off */
 		DrawBoolButton(buttons_left, button_y, value != 0, editable);
-	} else if ((sd->flags & SGF_MULTISTRING) != 0) {
+	} else if ((sd->flags & SF_GUI_DROPDOWN) != 0) {
 		/* Draw [v] button for settings of an enum-type */
 		DrawDropDownButton(buttons_left, button_y, COLOUR_YELLOW, state != 0, editable);
 	} else {
 		/* Draw [<][>] boxes for settings of an integer-type */
 		DrawArrowButtons(buttons_left, button_y, COLOUR_YELLOW, state,
-				editable && value != (sd->flags & SGF_0ISDISABLED ? 0 : sd->min), editable && (uint32)value != sd->max);
+				editable && value != (sd->flags & SF_GUI_0_IS_SPECIAL ? 0 : sd->min), editable && (uint32)value != sd->max);
 	}
 	this->SetValueDParams(1, value);
 	DrawString(text_left, text_right, y + (SETTING_HEIGHT - FONT_HEIGHT_NORMAL) / 2, sd->str, highlight ? TC_WHITE : TC_LIGHT_BLUE);
@@ -2182,7 +2182,7 @@ struct GameSettingsWindow : Window {
 		int32 value = sd->Read(ResolveObject(settings_ptr, sd));
 
 		/* clicked on the icon on the left side. Either scroller, bool on/off or dropdown */
-		if (x < SETTING_BUTTON_WIDTH && (sd->flags & SGF_MULTISTRING)) {
+		if (x < SETTING_BUTTON_WIDTH && (sd->flags & SF_GUI_DROPDOWN)) {
 			this->SetDisplayedHelpText(pe);
 
 			if (this->valuedropdown_entry == pe) {
@@ -2250,7 +2250,7 @@ struct GameSettingsWindow : Window {
 					if (value < sd->min) value = sd->min; // skip between "disabled" and minimum
 				} else {
 					value -= step;
-					if (value < sd->min) value = (sd->flags & SGF_0ISDISABLED) ? 0 : sd->min;
+					if (value < sd->min) value = (sd->flags & SF_GUI_0_IS_SPECIAL) ? 0 : sd->min;
 				}
 
 				/* Set up scroller timeout for numeric values */
@@ -2271,10 +2271,10 @@ struct GameSettingsWindow : Window {
 			}
 		} else {
 			/* Only open editbox if clicked for the second time, and only for types where it is sensible for. */
-			if (this->last_clicked == pe && !sd->IsBoolSetting() && !(sd->flags & SGF_MULTISTRING)) {
+			if (this->last_clicked == pe && !sd->IsBoolSetting() && !(sd->flags & SF_GUI_DROPDOWN)) {
 				int64 value64 = value;
 				/* Show the correct currency-translated value */
-				if (sd->flags & SGF_CURRENCY) value64 *= _currency->rate;
+				if (sd->flags & SF_GUI_CURRENCY) value64 *= _currency->rate;
 
 				this->valuewindow_entry = pe;
 				SetDParam(0, value64);
@@ -2307,7 +2307,7 @@ struct GameSettingsWindow : Window {
 			long long llvalue = atoll(str);
 
 			/* Save the correct currency-translated value */
-			if (sd->flags & SGF_CURRENCY) llvalue /= _currency->rate;
+			if (sd->flags & SF_GUI_CURRENCY) llvalue /= _currency->rate;
 
 			value = (int32)ClampToI32(llvalue);
 		} else {
@@ -2348,7 +2348,7 @@ struct GameSettingsWindow : Window {
 					/* Deal with drop down boxes on the panel. */
 					assert(this->valuedropdown_entry != nullptr);
 					const IntSettingDesc *sd = this->valuedropdown_entry->setting;
-					assert(sd->flags & SGF_MULTISTRING);
+					assert(sd->flags & SF_GUI_DROPDOWN);
 
 					SetSettingValue(sd, index);
 					this->SetDirty();
diff --git a/src/settings_internal.h b/src/settings_internal.h
index 632d4081d..351c66ea3 100644
--- a/src/settings_internal.h
+++ b/src/settings_internal.h
@@ -12,21 +12,20 @@
 
 #include "saveload/saveload.h"
 
-enum SettingGuiFlag : uint16 {
-	/* 2 bytes allocated for a maximum of 16 flags. */
-	SGF_NONE = 0,
-	SGF_0ISDISABLED   = 1 << 0, ///< a value of zero means the feature is disabled
-	SGF_DISPLAY_ABS   = 1 << 1, ///< display absolute value of the setting
-	SGF_MULTISTRING   = 1 << 2, ///< the value represents a limited number of string-options (internally integer)
-	SGF_NETWORK_ONLY  = 1 << 3, ///< this setting only applies to network games
-	SGF_CURRENCY      = 1 << 4, ///< the number represents money, so when reading value multiply by exchange rate
-	SGF_NO_NETWORK    = 1 << 5, ///< this setting does not apply to network games; it may not be changed during the game
-	SGF_NEWGAME_ONLY  = 1 << 6, ///< this setting cannot be changed in a game
-	SGF_SCENEDIT_TOO  = 1 << 7, ///< this setting can be changed in the scenario editor (only makes sense when SGF_NEWGAME_ONLY is set)
-	SGF_PER_COMPANY   = 1 << 8, ///< this setting can be different for each company (saved in company struct)
-	SGF_SCENEDIT_ONLY = 1 << 9, ///< this setting can only be changed in the scenario editor
+enum SettingFlag : uint16 {
+	SF_NONE = 0,
+	SF_GUI_0_IS_SPECIAL        = 1 << 0, ///< A value of zero is possible and has a custom string (the one after "strval").
+	SF_GUI_NEGATIVE_IS_SPECIAL = 1 << 1, ///< A negative value has another string (the one after "strval").
+	SF_GUI_DROPDOWN            = 1 << 2, ///< The value represents a limited number of string-options (internally integer) presented as dropdown.
+	SF_GUI_CURRENCY            = 1 << 3, ///< The number represents money, so when reading value multiply by exchange rate.
+	SF_NETWORK_ONLY            = 1 << 4, ///< This setting only applies to network games.
+	SF_NO_NETWORK              = 1 << 5, ///< This setting does not apply to network games; it may not be changed during the game.
+	SF_NEWGAME_ONLY            = 1 << 6, ///< This setting cannot be changed in a game.
+	SF_SCENEDIT_TOO            = 1 << 7, ///< This setting can be changed in the scenario editor (only makes sense when SF_NEWGAME_ONLY is set).
+	SF_SCENEDIT_ONLY           = 1 << 8, ///< This setting can only be changed in the scenario editor.
+	SF_PER_COMPANY             = 1 << 9, ///< This setting can be different for each company (saved in company struct).
 };
-DECLARE_ENUM_AS_BIT_SET(SettingGuiFlag)
+DECLARE_ENUM_AS_BIT_SET(SettingFlag)
 
 /**
  * A SettingCategory defines a grouping of the settings.
@@ -67,14 +66,14 @@ struct IniItem;
 
 /** Properties of config file settings. */
 struct SettingDesc {
-	SettingDesc(SaveLoad save, const char *name, SettingGuiFlag flags, bool startup) :
+	SettingDesc(SaveLoad save, const char *name, SettingFlag flags, bool startup) :
 		name(name), flags(flags), startup(startup), save(save) {}
 	virtual ~SettingDesc() {}
 
-	const char *name;       ///< name of the setting. Used in configuration file and for console
-	SettingGuiFlag flags;   ///< handles how a setting would show up in the GUI (text/currency, etc.)
-	bool startup;           ///< setting has to be loaded directly at startup?
-	SaveLoad save;          ///< Internal structure (going to savegame, parts to config)
+	const char *name;   ///< Name of the setting. Used in configuration file and for console.
+	SettingFlag flags;  ///< Handles how a setting would show up in the GUI (text/currency, etc.).
+	bool startup;       ///< Setting has to be loaded directly at startup?.
+	SaveLoad save;      ///< Internal structure (going to savegame, parts to config).
 
 	bool IsEditable(bool do_command = false) const;
 	SettingType GetType() const;
@@ -138,7 +137,7 @@ struct IntSettingDesc : SettingDesc {
 	 */
 	typedef void PostChangeCallback(int32 value);
 
-	IntSettingDesc(SaveLoad save, const char *name, SettingGuiFlag flags, bool startup, int32 def,
+	IntSettingDesc(SaveLoad save, const char *name, SettingFlag flags, bool startup, int32 def,
 			int32 min, uint32 max, int32 interval, StringID str, StringID str_help, StringID str_val,
 			SettingCategory cat, PreChangeCheck pre_check, PostChangeCallback post_callback) :
 		SettingDesc(save, name, flags, startup), def(def), min(min), max(max), interval(interval),
@@ -180,7 +179,7 @@ private:
 
 /** Boolean setting. */
 struct BoolSettingDesc : IntSettingDesc {
-	BoolSettingDesc(SaveLoad save, const char *name, SettingGuiFlag flags, bool startup, bool def,
+	BoolSettingDesc(SaveLoad save, const char *name, SettingFlag flags, bool startup, bool def,
 			StringID str, StringID str_help, StringID str_val, SettingCategory cat,
 			PreChangeCheck pre_check, PostChangeCallback post_callback) :
 		IntSettingDesc(save, name, flags, startup, def, 0, 1, 0, str, str_help, str_val, cat,
@@ -196,7 +195,7 @@ struct BoolSettingDesc : IntSettingDesc {
 struct OneOfManySettingDesc : IntSettingDesc {
 	typedef size_t OnConvert(const char *value); ///< callback prototype for conversion error
 
-	OneOfManySettingDesc(SaveLoad save, const char *name, SettingGuiFlag flags, bool startup, int32 def,
+	OneOfManySettingDesc(SaveLoad save, const char *name, SettingFlag flags, bool startup, int32 def,
 			int32 max, StringID str, StringID str_help, StringID str_val, SettingCategory cat,
 			PreChangeCheck pre_check, PostChangeCallback post_callback,
 			std::initializer_list<const char *> many, OnConvert *many_cnvt) :
@@ -220,7 +219,7 @@ struct OneOfManySettingDesc : IntSettingDesc {
 
 /** Many of many setting. */
 struct ManyOfManySettingDesc : OneOfManySettingDesc {
-	ManyOfManySettingDesc(SaveLoad save, const char *name, SettingGuiFlag flags, bool startup,
+	ManyOfManySettingDesc(SaveLoad save, const char *name, SettingFlag flags, bool startup,
 		int32 def, StringID str, StringID str_help, StringID str_val, SettingCategory cat,
 		PreChangeCheck pre_check, PostChangeCallback post_callback,
 		std::initializer_list<const char *> many, OnConvert *many_cnvt) :
@@ -249,7 +248,7 @@ struct StringSettingDesc : SettingDesc {
 	 */
 	typedef void PostChangeCallback(const std::string &value);
 
-	StringSettingDesc(SaveLoad save, const char *name, SettingGuiFlag flags, bool startup, const char *def,
+	StringSettingDesc(SaveLoad save, const char *name, SettingFlag flags, bool startup, const char *def,
 			uint32 max_length, PreChangeCheck pre_check, PostChangeCallback post_callback) :
 		SettingDesc(save, name, flags, startup), def(def == nullptr ? "" : def), max_length(max_length),
 			pre_check(pre_check), post_callback(post_callback) {}
@@ -275,7 +274,7 @@ private:
 
 /** List/array settings. */
 struct ListSettingDesc : SettingDesc {
-	ListSettingDesc(SaveLoad save, const char *name, SettingGuiFlag flags, bool startup, const char *def) :
+	ListSettingDesc(SaveLoad save, const char *name, SettingFlag flags, bool startup, const char *def) :
 		SettingDesc(save, name, flags, startup), def(def) {}
 	virtual ~ListSettingDesc() {}
 
@@ -289,7 +288,7 @@ struct ListSettingDesc : SettingDesc {
 /** Placeholder for settings that have been removed, but might still linger in the savegame. */
 struct NullSettingDesc : SettingDesc {
 	NullSettingDesc(SaveLoad save) :
-		SettingDesc(save, "", SGF_NONE, false) {}
+		SettingDesc(save, "", SF_NONE, false) {}
 	virtual ~NullSettingDesc() {}
 
 	void FormatValue(char *buf, const char *last, const void *object) const override { NOT_REACHED(); }
diff --git a/src/table/settings/company_settings.ini b/src/table/settings/company_settings.ini
index 576710065..6b6a17c96 100644
--- a/src/table/settings/company_settings.ini
+++ b/src/table/settings/company_settings.ini
@@ -24,7 +24,7 @@ SDT_VAR = static_assert($max <= MAX_$type, "Maximum value for CompanySettings.$v
 
 [defaults]
 flags    = 0
-guiflags = SGF_PER_COMPANY
+guiflags = SF_PER_COMPANY
 interval = 0
 str      = STR_NULL
 strhelp  = STR_CONFIG_SETTING_NO_EXPLANATION_AVAILABLE_HELPTEXT
@@ -50,7 +50,7 @@ cat      = SC_BASIC
 [SDT_VAR]
 var      = engine_renew_months
 type     = SLE_INT16
-guiflags = SGF_PER_COMPANY | SGF_DISPLAY_ABS
+guiflags = SF_PER_COMPANY | SF_GUI_NEGATIVE_IS_SPECIAL
 def      = 6
 min      = -12
 max      = 12
@@ -61,7 +61,7 @@ strval   = STR_CONFIG_SETTING_AUTORENEW_MONTHS_VALUE_BEFORE
 [SDT_VAR]
 var      = engine_renew_money
 type     = SLE_UINT
-guiflags = SGF_PER_COMPANY | SGF_CURRENCY
+guiflags = SF_PER_COMPANY | SF_GUI_CURRENCY
 def      = 100000
 min      = 0
 max      = 2000000
@@ -83,7 +83,7 @@ post_cb  = UpdateServiceInterval
 [SDT_VAR]
 var      = vehicle.servint_trains
 type     = SLE_UINT16
-guiflags = SGF_PER_COMPANY | SGF_0ISDISABLED
+guiflags = SF_PER_COMPANY | SF_GUI_0_IS_SPECIAL
 def      = 150
 min      = 5
 max      = 800
@@ -96,7 +96,7 @@ post_cb  = [](auto new_value) { UpdateServiceInterval(VEH_TRAIN, new_value); }
 [SDT_VAR]
 var      = vehicle.servint_roadveh
 type     = SLE_UINT16
-guiflags = SGF_PER_COMPANY | SGF_0ISDISABLED
+guiflags = SF_PER_COMPANY | SF_GUI_0_IS_SPECIAL
 def      = 150
 min      = 5
 max      = 800
@@ -109,7 +109,7 @@ post_cb  = [](auto new_value) { UpdateServiceInterval(VEH_ROAD, new_value); }
 [SDT_VAR]
 var      = vehicle.servint_ships
 type     = SLE_UINT16
-guiflags = SGF_PER_COMPANY | SGF_0ISDISABLED
+guiflags = SF_PER_COMPANY | SF_GUI_0_IS_SPECIAL
 def      = 360
 min      = 5
 max      = 800
@@ -122,7 +122,7 @@ post_cb  = [](auto new_value) { UpdateServiceInterval(VEH_SHIP, new_value); }
 [SDT_VAR]
 var      = vehicle.servint_aircraft
 type     = SLE_UINT16
-guiflags = SGF_PER_COMPANY | SGF_0ISDISABLED
+guiflags = SF_PER_COMPANY | SF_GUI_0_IS_SPECIAL
 def      = 100
 min      = 5
 max      = 800
diff --git a/src/table/settings/currency_settings.ini b/src/table/settings/currency_settings.ini
index a10583150..8e359d5c0 100644
--- a/src/table/settings/currency_settings.ini
+++ b/src/table/settings/currency_settings.ini
@@ -19,7 +19,7 @@ SDT_VAR = static_assert($max <= MAX_$type, "Maximum value for CurrencySpec.$var
 
 [defaults]
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NONE
+guiflags = SF_NONE
 interval = 0
 str      = STR_NULL
 strhelp  = STR_CONFIG_SETTING_NO_EXPLANATION_AVAILABLE_HELPTEXT
diff --git a/src/table/settings/gameopt_settings.ini b/src/table/settings/gameopt_settings.ini
index f24adb17a..195bae365 100644
--- a/src/table/settings/gameopt_settings.ini
+++ b/src/table/settings/gameopt_settings.ini
@@ -63,7 +63,7 @@ SDT_VAR = static_assert($max <= MAX_$type, "Maximum value for GameSettings.$var
 
 [defaults]
 flags    = 0
-guiflags = SGF_NONE
+guiflags = SF_NONE
 interval = 0
 str      = STR_NULL
 strhelp  = STR_CONFIG_SETTING_NO_EXPLANATION_AVAILABLE_HELPTEXT
diff --git a/src/table/settings/misc_settings.ini b/src/table/settings/misc_settings.ini
index bafdf2369..45da1db52 100644
--- a/src/table/settings/misc_settings.ini
+++ b/src/table/settings/misc_settings.ini
@@ -37,7 +37,7 @@ SDTG_OMANY = static_assert($max <= MAX_$type, "Maximum value for $var exceeds st
 
 [defaults]
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NONE
+guiflags = SF_NONE
 interval = 0
 str      = STR_NULL
 strhelp  = STR_CONFIG_SETTING_NO_EXPLANATION_AVAILABLE_HELPTEXT
diff --git a/src/table/settings/settings.ini b/src/table/settings/settings.ini
index 9281ed662..be4d7ea94 100644
--- a/src/table/settings/settings.ini
+++ b/src/table/settings/settings.ini
@@ -77,7 +77,7 @@ SDT_VAR = static_assert($max <= MAX_$type, "Maximum value for GameSettings.$var
 
 [defaults]
 flags    = 0
-guiflags = SGF_NONE
+guiflags = SF_NONE
 interval = 0
 str      = STR_NULL
 strhelp  = STR_CONFIG_SETTING_NO_EXPLANATION_AVAILABLE_HELPTEXT
@@ -119,7 +119,7 @@ max      = 3
 var      = difficulty.number_towns
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_NEWGAME_ONLY
+guiflags = SF_NEWGAME_ONLY
 def      = 2
 min      = 0
 max      = 4
@@ -131,7 +131,7 @@ cat      = SC_BASIC
 var      = difficulty.industry_density
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = ID_END - 1
 min      = 0
 max      = ID_END - 1
@@ -145,7 +145,7 @@ cat      = SC_BASIC
 var      = difficulty.max_loan
 type     = SLE_UINT32
 from     = SLV_97
-guiflags = SGF_NEWGAME_ONLY | SGF_SCENEDIT_TOO | SGF_CURRENCY
+guiflags = SF_NEWGAME_ONLY | SF_SCENEDIT_TOO | SF_GUI_CURRENCY
 def      = 300000
 min      = 0
 max      = 2000000000
@@ -159,7 +159,7 @@ cat      = SC_BASIC
 var      = difficulty.initial_interest
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_NEWGAME_ONLY | SGF_SCENEDIT_TOO
+guiflags = SF_NEWGAME_ONLY | SF_SCENEDIT_TOO
 def      = 2
 min      = 2
 max      = 4
@@ -172,7 +172,7 @@ strval   = STR_CONFIG_SETTING_PERCENTAGE
 var      = difficulty.vehicle_costs
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_NEWGAME_ONLY | SGF_SCENEDIT_TOO | SGF_MULTISTRING
+guiflags = SF_NEWGAME_ONLY | SF_SCENEDIT_TOO | SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 2
@@ -186,7 +186,7 @@ cat      = SC_BASIC
 var      = difficulty.competitor_speed
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 0
 max      = 4
@@ -209,7 +209,7 @@ max      = 2
 var      = difficulty.vehicle_breakdowns
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 min      = 0
 max      = 2
@@ -223,7 +223,7 @@ cat      = SC_BASIC
 var      = difficulty.subsidy_multiplier
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 0
 max      = 3
@@ -236,7 +236,7 @@ strval   = STR_SUBSIDY_X1_5
 var      = difficulty.construction_cost
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_NEWGAME_ONLY | SGF_SCENEDIT_TOO | SGF_MULTISTRING
+guiflags = SF_NEWGAME_ONLY | SF_SCENEDIT_TOO | SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 2
@@ -250,7 +250,7 @@ cat      = SC_BASIC
 var      = difficulty.terrain_type
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_MULTISTRING | SGF_NEWGAME_ONLY
+guiflags = SF_GUI_DROPDOWN | SF_NEWGAME_ONLY
 def      = 1
 min      = 0
 max      = 5
@@ -264,7 +264,7 @@ cat      = SC_BASIC
 var      = difficulty.quantity_sea_lakes
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_NEWGAME_ONLY
+guiflags = SF_NEWGAME_ONLY
 def      = 0
 min      = 0
 max      = 4
@@ -298,7 +298,7 @@ cat      = SC_BASIC
 var      = difficulty.town_council_tolerance
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 2
@@ -326,7 +326,7 @@ cat      = SC_BASIC
 var      = game_creation.town_name
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = 0
 max      = 255
 full     = _town_names
@@ -336,7 +336,7 @@ cat      = SC_BASIC
 var      = game_creation.landscape
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_MULTISTRING | SGF_NEWGAME_ONLY
+guiflags = SF_GUI_DROPDOWN | SF_NEWGAME_ONLY
 def      = 0
 max      = 3
 full     = _climates
@@ -356,7 +356,7 @@ to       = SLV_164
 var      = vehicle.road_side
 type     = SLE_UINT8
 from     = SLV_97
-guiflags = SGF_MULTISTRING | SGF_NO_NETWORK
+guiflags = SF_GUI_DROPDOWN | SF_NO_NETWORK
 def      = 1
 max      = 1
 full     = _roadsides
@@ -372,7 +372,7 @@ cat      = SC_BASIC
 var      = construction.map_height_limit
 type     = SLE_UINT8
 from     = SLV_194
-guiflags = SGF_NEWGAME_ONLY | SGF_SCENEDIT_TOO | SGF_0ISDISABLED
+guiflags = SF_NEWGAME_ONLY | SF_SCENEDIT_TOO | SF_GUI_0_IS_SPECIAL
 def      = 0
 min      = MIN_MAP_HEIGHT_LIMIT
 max      = MAX_MAP_HEIGHT_LIMIT
@@ -388,7 +388,7 @@ cat      = SC_ADVANCED
 var      = game_creation.heightmap_height
 type     = SLE_UINT8
 from     = SLV_MAPGEN_SETTINGS_REVAMP
-guiflags = SGF_NEWGAME_ONLY
+guiflags = SF_NEWGAME_ONLY
 def      = MAP_HEIGHT_LIMIT_AUTO_MINIMUM
 min      = MIN_HEIGHTMAP_HEIGHT
 max      = MAX_MAP_HEIGHT_LIMIT
@@ -396,7 +396,7 @@ interval = 1
 
 [SDT_BOOL]
 var      = construction.build_on_slopes
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = true
 cat      = SC_EXPERT
 
@@ -404,7 +404,7 @@ cat      = SC_EXPERT
 var      = construction.command_pause_level
 type     = SLE_UINT8
 from     = SLV_154
-guiflags = SGF_MULTISTRING | SGF_NO_NETWORK
+guiflags = SF_GUI_DROPDOWN | SF_NO_NETWORK
 def      = 1
 min      = 0
 max      = 3
@@ -491,7 +491,7 @@ strhelp  = STR_CONFIG_SETTING_EXTRADYNAMITE_HELPTEXT
 var      = construction.max_bridge_length
 type     = SLE_UINT16
 from     = SLV_159
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = 64
 min      = 1
 max      = MAX_MAP_SIZE
@@ -504,7 +504,7 @@ strval   = STR_CONFIG_SETTING_TILE_LENGTH
 var      = construction.max_bridge_height
 type     = SLE_UINT8
 from     = SLV_194
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = 12
 min      = 1
 max      = MAX_TILE_HEIGHT
@@ -518,7 +518,7 @@ cat      = SC_EXPERT
 var      = construction.max_tunnel_length
 type     = SLE_UINT16
 from     = SLV_159
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = 64
 min      = 1
 max      = MAX_MAP_SIZE
@@ -535,7 +535,7 @@ to       = SLV_159
 [SDT_VAR]
 var      = construction.train_signal_side
 type     = SLE_UINT8
-guiflags = SGF_MULTISTRING | SGF_NO_NETWORK
+guiflags = SF_GUI_DROPDOWN | SF_NO_NETWORK
 def      = 1
 min      = 0
 max      = 2
@@ -547,7 +547,7 @@ cat      = SC_BASIC
 
 [SDT_BOOL]
 var      = station.never_expire_airports
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = false
 str      = STR_CONFIG_SETTING_NEVER_EXPIRE_AIRPORTS
 strhelp  = STR_CONFIG_SETTING_NEVER_EXPIRE_AIRPORTS_HELPTEXT
@@ -556,7 +556,7 @@ strhelp  = STR_CONFIG_SETTING_NEVER_EXPIRE_AIRPORTS_HELPTEXT
 var      = economy.town_layout
 type     = SLE_UINT8
 from     = SLV_59
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = TL_ORIGINAL
 min      = TL_BEGIN
 max      = NUM_TLS - 1
@@ -569,7 +569,7 @@ post_cb  = TownFoundingChanged
 [SDT_BOOL]
 var      = economy.allow_town_roads
 from     = SLV_113
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = true
 str      = STR_CONFIG_SETTING_ALLOW_TOWN_ROADS
 strhelp  = STR_CONFIG_SETTING_ALLOW_TOWN_ROADS_HELPTEXT
@@ -578,7 +578,7 @@ strhelp  = STR_CONFIG_SETTING_ALLOW_TOWN_ROADS_HELPTEXT
 var      = economy.found_town
 type     = SLE_UINT8
 from     = SLV_128
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = TF_FORBIDDEN
 min      = TF_BEGIN
 max      = TF_END - 1
@@ -592,7 +592,7 @@ cat      = SC_BASIC
 [SDT_BOOL]
 var      = economy.allow_town_level_crossings
 from     = SLV_143
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = true
 str      = STR_CONFIG_SETTING_ALLOW_TOWN_LEVEL_CROSSINGS
 strhelp  = STR_CONFIG_SETTING_ALLOW_TOWN_LEVEL_CROSSINGS_HELPTEXT
@@ -601,7 +601,7 @@ strhelp  = STR_CONFIG_SETTING_ALLOW_TOWN_LEVEL_CROSSINGS_HELPTEXT
 var      = economy.town_cargogen_mode
 type     = SLE_UINT8
 from     = SLV_TOWN_CARGOGEN
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = TCGM_BITCOUNT
 min      = TCGM_BEGIN
 max      = TCGM_END - 1
@@ -644,7 +644,7 @@ extra    = offsetof(LinkGraphSettings, recalc_time)
 var      = linkgraph.distribution_pax
 type     = SLE_UINT8
 from     = SLV_183
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = DT_MANUAL
 min      = DT_MIN
 max      = DT_MAX
@@ -659,7 +659,7 @@ extra    = offsetof(LinkGraphSettings, distribution_pax)
 var      = linkgraph.distribution_mail
 type     = SLE_UINT8
 from     = SLV_183
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = DT_MANUAL
 min      = DT_MIN
 max      = DT_MAX
@@ -674,7 +674,7 @@ extra    = offsetof(LinkGraphSettings, distribution_mail)
 var      = linkgraph.distribution_armoured
 type     = SLE_UINT8
 from     = SLV_183
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = DT_MANUAL
 min      = DT_MIN
 max      = DT_MAX
@@ -689,7 +689,7 @@ extra    = offsetof(LinkGraphSettings, distribution_armoured)
 var      = linkgraph.distribution_default
 type     = SLE_UINT8
 from     = SLV_183
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = DT_MANUAL
 min      = DT_BEGIN
 max      = DT_MAX_NONSYMMETRIC
@@ -761,7 +761,7 @@ extra    = offsetof(LinkGraphSettings, short_path_saturation)
 [SDT_VAR]
 var      = vehicle.train_acceleration_model
 type     = SLE_UINT8
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 min      = 0
 max      = 1
@@ -775,7 +775,7 @@ post_cb  = TrainAccelerationModelChanged
 var      = vehicle.roadveh_acceleration_model
 type     = SLE_UINT8
 from     = SLV_139
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 min      = 0
 max      = 1
@@ -843,7 +843,7 @@ to       = SLV_159
 var      = vehicle.smoke_amount
 type     = SLE_UINT8
 from     = SLV_145
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 min      = 0
 max      = 2
@@ -895,7 +895,7 @@ cat      = SC_EXPERT
 var      = pf.pathfinder_for_trains
 type     = SLE_UINT8
 from     = SLV_87
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 1
 max      = 2
@@ -909,7 +909,7 @@ cat      = SC_EXPERT
 var      = pf.pathfinder_for_roadvehs
 type     = SLE_UINT8
 from     = SLV_87
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 1
 max      = 2
@@ -923,7 +923,7 @@ cat      = SC_EXPERT
 var      = pf.pathfinder_for_ships
 type     = SLE_UINT8
 from     = SLV_87
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 1
 max      = 2
@@ -936,7 +936,7 @@ cat      = SC_EXPERT
 
 [SDT_BOOL]
 var      = vehicle.never_expire_vehicles
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = false
 str      = STR_CONFIG_SETTING_NEVER_EXPIRE_VEHICLES
 strhelp  = STR_CONFIG_SETTING_NEVER_EXPIRE_VEHICLES_HELPTEXT
@@ -991,7 +991,7 @@ cat      = SC_BASIC
 
 [SDTG_BOOL]
 name     = nullptr
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 var      = _old_vds.servint_ispercent
 def      = false
 to       = SLV_120
@@ -999,7 +999,7 @@ to       = SLV_120
 [SDTG_VAR]
 name     = nullptr
 type     = SLE_UINT16
-guiflags = SGF_0ISDISABLED
+guiflags = SF_GUI_0_IS_SPECIAL
 var      = _old_vds.servint_trains
 def      = 150
 min      = 5
@@ -1009,7 +1009,7 @@ to       = SLV_120
 [SDTG_VAR]
 name     = nullptr
 type     = SLE_UINT16
-guiflags = SGF_0ISDISABLED
+guiflags = SF_GUI_0_IS_SPECIAL
 var      = _old_vds.servint_roadveh
 def      = 150
 min      = 5
@@ -1019,7 +1019,7 @@ to       = SLV_120
 [SDTG_VAR]
 name     = nullptr
 type     = SLE_UINT16
-guiflags = SGF_0ISDISABLED
+guiflags = SF_GUI_0_IS_SPECIAL
 var      = _old_vds.servint_ships
 def      = 360
 min      = 5
@@ -1029,7 +1029,7 @@ to       = SLV_120
 [SDTG_VAR]
 name     = nullptr
 type     = SLE_UINT16
-guiflags = SGF_0ISDISABLED
+guiflags = SF_GUI_0_IS_SPECIAL
 var      = _old_vds.servint_aircraft
 def      = 150
 min      = 5
@@ -1044,7 +1044,7 @@ strhelp  = STR_CONFIG_SETTING_NOSERVICE_HELPTEXT
 
 [SDT_BOOL]
 var      = vehicle.wagon_speed_limits
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = true
 str      = STR_CONFIG_SETTING_WAGONSPEEDLIMITS
 strhelp  = STR_CONFIG_SETTING_WAGONSPEEDLIMITS_HELPTEXT
@@ -1053,7 +1053,7 @@ post_cb  = UpdateConsists
 [SDT_BOOL]
 var      = vehicle.disable_elrails
 from     = SLV_38
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = false
 str      = STR_CONFIG_SETTING_DISABLE_ELRAILS
 strhelp  = STR_CONFIG_SETTING_DISABLE_ELRAILS_HELPTEXT
@@ -1064,7 +1064,7 @@ cat      = SC_EXPERT
 var      = vehicle.freight_trains
 type     = SLE_UINT8
 from     = SLV_39
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = 1
 min      = 1
 max      = 255
@@ -1084,7 +1084,7 @@ to       = SLV_159
 var      = vehicle.plane_speed
 type     = SLE_UINT8
 from     = SLV_90
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = 4
 min      = 1
 max      = 4
@@ -1095,7 +1095,7 @@ strval   = STR_CONFIG_SETTING_PLANE_SPEED_VALUE
 [SDT_BOOL]
 var      = vehicle.dynamic_engines
 from     = SLV_95
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = true
 pre_cb   = CheckDynamicEngines
 cat      = SC_EXPERT
@@ -1104,7 +1104,7 @@ cat      = SC_EXPERT
 var      = vehicle.plane_crashes
 type     = SLE_UINT8
 from     = SLV_138
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 0
 max      = 2
@@ -1127,7 +1127,7 @@ def      = true
 
 [SDT_BOOL]
 var      = order.improved_load
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = true
 cat      = SC_EXPERT
 
@@ -1185,7 +1185,7 @@ post_cb  = StationCatchmentChanged
 [SDT_BOOL]
 var      = order.gradual_loading
 from     = SLV_40
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = true
 cat      = SC_EXPERT
 
@@ -1214,7 +1214,7 @@ cat      = SC_EXPERT
 [SDT_BOOL]
 var      = economy.station_noise_level
 from     = SLV_96
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = false
 str      = STR_CONFIG_SETTING_NOISE_LEVEL
 strhelp  = STR_CONFIG_SETTING_NOISE_LEVEL_HELPTEXT
@@ -1231,7 +1231,7 @@ post_cb  = [](auto) { CloseWindowById(WC_SELECT_STATION, 0); }
 ##
 [SDT_BOOL]
 var      = economy.inflation
-guiflags = SGF_NO_NETWORK
+guiflags = SF_NO_NETWORK
 def      = false
 str      = STR_CONFIG_SETTING_INFLATION
 strhelp  = STR_CONFIG_SETTING_INFLATION_HELPTEXT
@@ -1240,7 +1240,7 @@ cat      = SC_BASIC
 [SDT_VAR]
 var      = construction.raw_industry_construction
 type     = SLE_UINT8
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 2
@@ -1318,7 +1318,7 @@ cat      = SC_BASIC
 [SDT_VAR]
 var      = game_creation.snow_line_height
 type     = SLE_UINT8
-guiflags = SGF_SCENEDIT_ONLY
+guiflags = SF_SCENEDIT_ONLY
 def      = DEF_SNOWLINE_HEIGHT
 min      = MIN_SNOWLINE_HEIGHT
 max      = MAX_SNOWLINE_HEIGHT
@@ -1332,7 +1332,7 @@ cat      = SC_BASIC
 var      = game_creation.snow_coverage
 type     = SLE_UINT8
 from     = SLV_MAPGEN_SETTINGS_REVAMP
-guiflags = SGF_NEWGAME_ONLY
+guiflags = SF_NEWGAME_ONLY
 def      = DEF_SNOW_COVERAGE
 min      = 0
 max      = 100
@@ -1346,7 +1346,7 @@ cat      = SC_BASIC
 var      = game_creation.desert_coverage
 type     = SLE_UINT8
 from     = SLV_MAPGEN_SETTINGS_REVAMP
-guiflags = SGF_NEWGAME_ONLY
+guiflags = SF_NEWGAME_ONLY
 def      = DEF_DESERT_COVERAGE
 min      = 0
 max      = 100
@@ -1379,7 +1379,7 @@ to       = SLV_105
 var      = game_creation.ending_year
 type     = SLE_INT32
 from     = SLV_ENDING_YEAR
-guiflags = SGF_0ISDISABLED
+guiflags = SF_GUI_0_IS_SPECIAL
 def      = DEF_END_YEAR
 min      = MIN_YEAR
 max      = MAX_YEAR - 1
@@ -1392,7 +1392,7 @@ cat      = SC_ADVANCED
 [SDT_VAR]
 var      = economy.type
 type     = SLE_UINT8
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = ET_SMOOTH
 min      = ET_BEGIN
 max      = ET_END - 1
@@ -1438,7 +1438,7 @@ cat      = SC_EXPERT
 var      = economy.town_growth_rate
 type     = SLE_UINT8
 from     = SLV_54
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 0
 max      = 4
@@ -1450,7 +1450,7 @@ strval   = STR_CONFIG_SETTING_TOWN_GROWTH_NONE
 var      = economy.larger_towns
 type     = SLE_UINT8
 from     = SLV_54
-guiflags = SGF_0ISDISABLED
+guiflags = SF_GUI_0_IS_SPECIAL
 def      = 4
 min      = 0
 max      = 255
@@ -1486,7 +1486,7 @@ to       = SLV_107
 var      = script.settings_profile
 type     = SLE_UINT8
 from     = SLV_178
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = SP_EASY
 min      = SP_EASY
 max      = SP_HARD
@@ -1531,7 +1531,7 @@ strhelp  = STR_CONFIG_SETTING_AI_BUILDS_SHIPS_HELPTEXT
 var      = script.script_max_opcode_till_suspend
 type     = SLE_UINT32
 from     = SLV_107
-guiflags = SGF_NEWGAME_ONLY
+guiflags = SF_NEWGAME_ONLY
 def      = 10000
 min      = 500
 max      = 250000
@@ -1545,7 +1545,7 @@ cat      = SC_EXPERT
 var      = script.script_max_memory_megabytes
 type     = SLE_UINT32
 from     = SLV_SCRIPT_MEMLIMIT
-guiflags = SGF_NEWGAME_ONLY
+guiflags = SF_NEWGAME_ONLY
 def      = 1024
 min      = 8
 max      = 8192
@@ -2119,7 +2119,7 @@ cat      = SC_EXPERT
 var      = game_creation.land_generator
 type     = SLE_UINT8
 from     = SLV_30
-guiflags = SGF_MULTISTRING | SGF_NEWGAME_ONLY
+guiflags = SF_GUI_DROPDOWN | SF_NEWGAME_ONLY
 def      = 1
 min      = 0
 max      = 1
@@ -2142,7 +2142,7 @@ strhelp  = STR_CONFIG_SETTING_OIL_REF_EDGE_DISTANCE_HELPTEXT
 var      = game_creation.tgen_smoothness
 type     = SLE_UINT8
 from     = SLV_30
-guiflags = SGF_MULTISTRING | SGF_NEWGAME_ONLY
+guiflags = SF_GUI_DROPDOWN | SF_NEWGAME_ONLY
 def      = 1
 min      = TGEN_SMOOTHNESS_BEGIN
 max      = TGEN_SMOOTHNESS_END - 1
@@ -2155,7 +2155,7 @@ cat      = SC_BASIC
 var      = game_creation.variety
 type     = SLE_UINT8
 from     = SLV_197
-guiflags = SGF_MULTISTRING | SGF_NEWGAME_ONLY
+guiflags = SF_GUI_DROPDOWN | SF_NEWGAME_ONLY
 def      = 0
 min      = 0
 max      = 5
@@ -2176,7 +2176,7 @@ cat      = SC_EXPERT
 var      = game_creation.tree_placer
 type     = SLE_UINT8
 from     = SLV_30
-guiflags = SGF_MULTISTRING | SGF_NEWGAME_ONLY | SGF_SCENEDIT_TOO
+guiflags = SF_GUI_DROPDOWN | SF_NEWGAME_ONLY | SF_SCENEDIT_TOO
 def      = 2
 min      = 0
 max      = 2
@@ -2189,7 +2189,7 @@ cat      = SC_BASIC
 var      = game_creation.heightmap_rotation
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 1
@@ -2256,7 +2256,7 @@ cat      = SC_BASIC
 var      = construction.extra_tree_placement
 type     = SLE_UINT8
 from     = SLV_132
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 0
 max      = 3
@@ -2269,7 +2269,7 @@ cat      = SC_BASIC
 var      = game_creation.custom_terrain_type
 type     = SLE_UINT8
 from     = SLV_MAPGEN_SETTINGS_REVAMP
-guiflags = SGF_NEWGAME_ONLY
+guiflags = SF_NEWGAME_ONLY
 def      = MAP_HEIGHT_LIMIT_AUTO_MINIMUM
 min      = MIN_CUSTOM_TERRAIN_TYPE
 max      = MAX_MAP_HEIGHT_LIMIT
@@ -2306,7 +2306,7 @@ cat      = SC_EXPERT
 var      = game_creation.amount_of_rivers
 type     = SLE_UINT8
 from     = SLV_163
-guiflags = SGF_MULTISTRING | SGF_NEWGAME_ONLY
+guiflags = SF_GUI_DROPDOWN | SF_NEWGAME_ONLY
 def      = 2
 min      = 0
 max      = 3
@@ -2345,7 +2345,7 @@ var      = locale.units_velocity
 type     = SLE_UINT8
 from     = SLV_184
 flags    = SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 3
 full     = _locale_units
@@ -2360,7 +2360,7 @@ var      = locale.units_power
 type     = SLE_UINT8
 from     = SLV_184
 flags    = SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 2
 full     = _locale_units
@@ -2375,7 +2375,7 @@ var      = locale.units_weight
 type     = SLE_UINT8
 from     = SLV_184
 flags    = SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 2
 full     = _locale_units
@@ -2390,7 +2390,7 @@ var      = locale.units_volume
 type     = SLE_UINT8
 from     = SLV_184
 flags    = SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 2
 full     = _locale_units
@@ -2405,7 +2405,7 @@ var      = locale.units_force
 type     = SLE_UINT8
 from     = SLV_184
 flags    = SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 max      = 2
 full     = _locale_units
@@ -2420,7 +2420,7 @@ var      = locale.units_height
 type     = SLE_UINT8
 from     = SLV_184
 flags    = SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 2
 full     = _locale_units
@@ -2465,7 +2465,7 @@ cat      = SC_BASIC
 var      = gui.autosave
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 4
 full     = _autosave_interval
@@ -2484,7 +2484,7 @@ cat      = SC_EXPERT
 var      = gui.date_format_in_default_names
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 max      = 2
 full     = _savegame_date
@@ -2504,7 +2504,7 @@ cat      = SC_BASIC
 var      = gui.auto_scrolling
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 3
@@ -2517,7 +2517,7 @@ cat      = SC_BASIC
 var      = gui.scroll_mode
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 3
@@ -2547,7 +2547,7 @@ ifdef    = __APPLE__
 var      = gui.right_mouse_btn_emulation
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 2
@@ -2579,7 +2579,7 @@ strval   = STR_CONFIG_SETTING_ERRMSG_DURATION_VALUE
 var      = gui.hover_delay_ms
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_0ISDISABLED
+guiflags = SF_GUI_0_IS_SPECIAL
 def      = 250
 min      = 50
 max      = 6000
@@ -2595,7 +2595,7 @@ flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
 str      = STR_CONFIG_SETTING_OSK_ACTIVATION
 strhelp  = STR_CONFIG_SETTING_OSK_ACTIVATION_HELPTEXT
 strval   = STR_CONFIG_SETTING_OSK_ACTIVATION_DISABLED
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 full     = _osk_activation
 def      = 1
 min      = 0
@@ -2606,7 +2606,7 @@ cat      = SC_BASIC
 var      = gui.toolbar_pos
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 min      = 0
 max      = 2
@@ -2620,7 +2620,7 @@ cat      = SC_BASIC
 var      = gui.statusbar_pos
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 min      = 0
 max      = 2
@@ -2634,7 +2634,7 @@ cat      = SC_BASIC
 var      = gui.window_snap_radius
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_0ISDISABLED
+guiflags = SF_GUI_0_IS_SPECIAL
 def      = 10
 min      = 1
 max      = 32
@@ -2647,7 +2647,7 @@ cat      = SC_EXPERT
 var      = gui.window_soft_limit
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_0ISDISABLED
+guiflags = SF_GUI_0_IS_SPECIAL
 def      = 20
 min      = 5
 max      = 255
@@ -2661,7 +2661,7 @@ cat      = SC_EXPERT
 var      = gui.zoom_min
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = ZOOM_LVL_MIN
 min      = ZOOM_LVL_MIN
 max      = ZOOM_LVL_OUT_4X
@@ -2675,7 +2675,7 @@ startup  = true
 var      = gui.zoom_max
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = ZOOM_LVL_MAX
 min      = ZOOM_LVL_OUT_8X
 max      = ZOOM_LVL_MAX
@@ -2689,7 +2689,7 @@ startup  = true
 var      = gui.sprite_zoom_min
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = ZOOM_LVL_MIN
 min      = ZOOM_LVL_MIN
 max      = ZOOM_LVL_OUT_4X
@@ -2717,7 +2717,7 @@ strhelp  = STR_CONFIG_SETTING_LINK_TERRAFORM_TOOLBAR_HELPTEXT
 var      = gui.smallmap_land_colour
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 2
@@ -2730,7 +2730,7 @@ post_cb  = RedrawSmallmap
 var      = gui.liveries
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 0
 max      = 2
@@ -2743,7 +2743,7 @@ post_cb  = InvalidateCompanyLiveryWindow
 var      = gui.starting_colour
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = COLOUR_END
 min      = 0
 max      = COLOUR_END
@@ -2771,7 +2771,7 @@ cat      = SC_BASIC
 var      = gui.scrollwheel_scrolling
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 2
@@ -2805,7 +2805,7 @@ cat      = SC_BASIC
 var      = gui.advanced_vehicle_list
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 min      = 0
 max      = 2
@@ -2842,7 +2842,7 @@ cat      = SC_BASIC
 var      = gui.loading_indicators
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 min      = 0
 max      = 2
@@ -2856,7 +2856,7 @@ cat      = SC_BASIC
 var      = gui.default_rail_type
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 min      = 0
 max      = 2
@@ -2933,7 +2933,7 @@ cat      = SC_BASIC
 var      = gui.order_review_system
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 0
 max      = 2
@@ -2961,7 +2961,7 @@ cat      = SC_BASIC
 var      = gui.stop_location
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 0
 max      = 2
@@ -3022,7 +3022,7 @@ cat      = SC_BASIC
 var      = gui.default_signal_type
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 min      = 0
 max      = 2
@@ -3036,7 +3036,7 @@ cat      = SC_BASIC
 var      = gui.cycle_signal_types
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 min      = 0
 max      = 2
@@ -3207,7 +3207,7 @@ cat      = SC_EXPERT
 var      = gui.newgrf_default_palette
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 min      = 0
 max      = 1
@@ -3244,7 +3244,7 @@ startup  = true
 var      = gui.fast_forward_speed_limit
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_0ISDISABLED | SGF_NO_NETWORK
+guiflags = SF_GUI_0_IS_SPECIAL | SF_NO_NETWORK
 def      = 2500
 min      = 0
 max      = 50000
@@ -3370,7 +3370,7 @@ cat      = SC_BASIC
 var      = news_display.arrival_player
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 max      = 2
 full     = _news_display
@@ -3382,7 +3382,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.arrival_other
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 2
 full     = _news_display
@@ -3394,7 +3394,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.accident
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 max      = 2
 full     = _news_display
@@ -3406,7 +3406,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.company_info
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 max      = 2
 full     = _news_display
@@ -3418,7 +3418,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.open
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 2
 full     = _news_display
@@ -3430,7 +3430,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.close
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 2
 full     = _news_display
@@ -3442,7 +3442,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.economy
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 max      = 2
 full     = _news_display
@@ -3454,7 +3454,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.production_player
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 2
 full     = _news_display
@@ -3466,7 +3466,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.production_other
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 max      = 2
 full     = _news_display
@@ -3478,7 +3478,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.production_nobody
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 0
 max      = 2
 full     = _news_display
@@ -3490,7 +3490,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.advice
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 max      = 2
 full     = _news_display
@@ -3502,7 +3502,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.new_vehicles
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 max      = 2
 full     = _news_display
@@ -3514,7 +3514,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.acceptance
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 max      = 2
 full     = _news_display
@@ -3526,7 +3526,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.subsidies
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 1
 max      = 2
 full     = _news_display
@@ -3538,7 +3538,7 @@ strval   = STR_CONFIG_SETTING_NEWS_MESSAGES_OFF
 var      = news_display.general
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_MULTISTRING
+guiflags = SF_GUI_DROPDOWN
 def      = 2
 max      = 2
 full     = _news_display
@@ -3577,7 +3577,7 @@ cat      = SC_EXPERT
 var      = network.sync_freq
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NOT_IN_CONFIG | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 100
 min      = 0
 max      = 100
@@ -3587,7 +3587,7 @@ cat      = SC_EXPERT
 var      = network.frame_freq
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NOT_IN_CONFIG | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 0
 min      = 0
 max      = 100
@@ -3597,7 +3597,7 @@ cat      = SC_EXPERT
 var      = network.commands_per_frame
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 2
 min      = 1
 max      = 65535
@@ -3607,7 +3607,7 @@ cat      = SC_EXPERT
 var      = network.max_commands_in_queue
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 16
 min      = 1
 max      = 65535
@@ -3617,7 +3617,7 @@ cat      = SC_EXPERT
 var      = network.bytes_per_frame
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 8
 min      = 1
 max      = 65535
@@ -3627,7 +3627,7 @@ cat      = SC_EXPERT
 var      = network.bytes_per_frame_burst
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 256
 min      = 1
 max      = 65535
@@ -3637,7 +3637,7 @@ cat      = SC_EXPERT
 var      = network.max_init_time
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 100
 min      = 0
 max      = 32000
@@ -3647,7 +3647,7 @@ cat      = SC_EXPERT
 var      = network.max_join_time
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 500
 min      = 0
 max      = 32000
@@ -3656,7 +3656,7 @@ max      = 32000
 var      = network.max_download_time
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 1000
 min      = 0
 max      = 32000
@@ -3665,7 +3665,7 @@ max      = 32000
 var      = network.max_password_time
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 2000
 min      = 0
 max      = 32000
@@ -3674,7 +3674,7 @@ max      = 32000
 var      = network.max_lag_time
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 500
 min      = 0
 max      = 32000
@@ -3682,14 +3682,14 @@ max      = 32000
 [SDTC_BOOL]
 var      = network.pause_on_join
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = true
 
 [SDTC_VAR]
 var      = network.server_port
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = NETWORK_DEFAULT_PORT
 min      = 0
 max      = 65535
@@ -3699,7 +3699,7 @@ cat      = SC_EXPERT
 var      = network.server_admin_port
 type     = SLE_UINT16
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = NETWORK_ADMIN_PORT
 min      = 0
 max      = 65535
@@ -3708,14 +3708,14 @@ cat      = SC_EXPERT
 [SDTC_BOOL]
 var      = network.server_admin_chat
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = true
 cat      = SC_EXPERT
 
 [SDTC_BOOL]
 var      = network.server_advertise
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = false
 
 [SDTC_SSTR]
@@ -3733,7 +3733,7 @@ var      = network.server_password
 type     = SLE_STR
 length   = NETWORK_PASSWORD_LENGTH
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = nullptr
 pre_cb   = ReplaceAsteriskWithEmptyPassword
 post_cb  = [](auto) { NetworkServerUpdateGameInfo(); }
@@ -3744,7 +3744,7 @@ var      = network.rcon_password
 type     = SLE_STR
 length   = NETWORK_PASSWORD_LENGTH
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = nullptr
 pre_cb   = ReplaceAsteriskWithEmptyPassword
 cat      = SC_BASIC
@@ -3754,7 +3754,7 @@ var      = network.admin_password
 type     = SLE_STR
 length   = NETWORK_PASSWORD_LENGTH
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = nullptr
 cat      = SC_BASIC
 
@@ -3770,7 +3770,7 @@ var      = network.server_name
 type     = SLE_STR
 length   = NETWORK_NAME_LENGTH
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = nullptr
 pre_cb   = NetworkValidateServerName
 post_cb  = [](auto) { UpdateClientConfigValues(); }
@@ -3788,20 +3788,20 @@ var      = network.network_id
 type     = SLE_STR
 length   = NETWORK_SERVER_ID_LENGTH
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = nullptr
 
 [SDTC_BOOL]
 var      = network.autoclean_companies
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = false
 
 [SDTC_VAR]
 var      = network.autoclean_unprotected
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_0ISDISABLED | SGF_NETWORK_ONLY
+guiflags = SF_GUI_0_IS_SPECIAL | SF_NETWORK_ONLY
 def      = 12
 min      = 0
 max      = 240
@@ -3810,7 +3810,7 @@ max      = 240
 var      = network.autoclean_protected
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_0ISDISABLED | SGF_NETWORK_ONLY
+guiflags = SF_GUI_0_IS_SPECIAL | SF_NETWORK_ONLY
 def      = 36
 min      = 0
 max      = 240
@@ -3819,7 +3819,7 @@ max      = 240
 var      = network.autoclean_novehicles
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_0ISDISABLED | SGF_NETWORK_ONLY
+guiflags = SF_GUI_0_IS_SPECIAL | SF_NETWORK_ONLY
 def      = 0
 min      = 0
 max      = 240
@@ -3828,7 +3828,7 @@ max      = 240
 var      = network.max_companies
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 15
 min      = 1
 max      = MAX_COMPANIES
@@ -3839,7 +3839,7 @@ cat      = SC_BASIC
 var      = network.max_clients
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 25
 min      = 2
 max      = MAX_CLIENTS
@@ -3850,7 +3850,7 @@ cat      = SC_BASIC
 var      = network.max_spectators
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 15
 min      = 0
 max      = MAX_CLIENTS
@@ -3861,7 +3861,7 @@ cat      = SC_BASIC
 var      = network.restart_game_year
 type     = SLE_INT32
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_0ISDISABLED | SGF_NETWORK_ONLY
+guiflags = SF_GUI_0_IS_SPECIAL | SF_NETWORK_ONLY
 def      = 0
 min      = MIN_YEAR
 max      = MAX_YEAR
@@ -3871,7 +3871,7 @@ interval = 1
 var      = network.min_active_clients
 type     = SLE_UINT8
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = 0
 min      = 0
 max      = MAX_CLIENTS
@@ -3879,7 +3879,7 @@ max      = MAX_CLIENTS
 [SDTC_BOOL]
 var      = network.reload_cfg
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NETWORK_ONLY
+guiflags = SF_NETWORK_ONLY
 def      = false
 cat      = SC_EXPERT
 
diff --git a/src/table/settings/win32_settings.ini b/src/table/settings/win32_settings.ini
index 7a3fb9a5c..32a5cf5c9 100644
--- a/src/table/settings/win32_settings.ini
+++ b/src/table/settings/win32_settings.ini
@@ -25,7 +25,7 @@ SDTG_VAR = static_assert($max <= MAX_$type, "Maximum value for $var exceeds stor
 
 [defaults]
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NONE
+guiflags = SF_NONE
 interval = 0
 str      = STR_NULL
 strhelp  = STR_CONFIG_SETTING_NO_EXPLANATION_AVAILABLE_HELPTEXT
diff --git a/src/table/settings/window_settings.ini b/src/table/settings/window_settings.ini
index 17596a4d5..f9301ef2c 100644
--- a/src/table/settings/window_settings.ini
+++ b/src/table/settings/window_settings.ini
@@ -21,7 +21,7 @@ SDT_VAR = static_assert($max <= MAX_$type, "Maximum value for WindowDesc.$var ex
 
 [defaults]
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
-guiflags = SGF_NONE
+guiflags = SF_NONE
 interval = 0
 str      = STR_NULL
 strhelp  = STR_CONFIG_SETTING_NO_EXPLANATION_AVAILABLE_HELPTEXT