(svn r25290) -Add: Assign string names to notable windows.

56 files changed, 142 insertions, 140 deletions

diff --git a/src/ai/ai_gui.cpp b/src/ai/ai_gui.cpp
index bfa985379..977a4e141 100644
--- a/src/ai/ai_gui.cpp
+++ b/src/ai/ai_gui.cpp
@@ -258,7 +258,7 @@ static const NWidgetPart _nested_ai_list_widgets[] = {
 
 /** Window definition for the ai list window. */
 static WindowDesc _ai_list_desc(
-	WDP_CENTER, 200, 234,
+	WDP_CENTER, "settings_script_list", 200, 234,
 	WC_AI_LIST, WC_NONE,
 	0,
 	_nested_ai_list_widgets, lengthof(_nested_ai_list_widgets)
@@ -604,7 +604,7 @@ static const NWidgetPart _nested_ai_settings_widgets[] = {
 
 /** Window definition for the AI settings window. */
 static WindowDesc _ai_settings_desc(
-	WDP_CENTER, 500, 208,
+	WDP_CENTER, "settings_script", 500, 208,
 	WC_AI_SETTINGS, WC_NONE,
 	0,
 	_nested_ai_settings_widgets, lengthof(_nested_ai_settings_widgets)
@@ -698,7 +698,7 @@ static const NWidgetPart _nested_ai_config_widgets[] = {
 
 /** Window definition for the configure AI window. */
 static WindowDesc _ai_config_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, "settings_script_config", 0, 0,
 	WC_GAME_OPTIONS, WC_NONE,
 	0,
 	_nested_ai_config_widgets, lengthof(_nested_ai_config_widgets)
@@ -1487,7 +1487,7 @@ static const NWidgetPart _nested_ai_debug_widgets[] = {
 
 /** Window definition for the AI debug window. */
 static WindowDesc _ai_debug_desc(
-	WDP_AUTO, 600, 450,
+	WDP_AUTO, "script_debug", 600, 450,
 	WC_AI_DEBUG, WC_NONE,
 	0,
 	_nested_ai_debug_widgets, lengthof(_nested_ai_debug_widgets)
diff --git a/src/airport_gui.cpp b/src/airport_gui.cpp
index 55f7e4ad9..597e3291e 100644
--- a/src/airport_gui.cpp
+++ b/src/airport_gui.cpp
@@ -166,7 +166,7 @@ static const NWidgetPart _nested_air_toolbar_widgets[] = {
 };
 
 static WindowDesc _air_toolbar_desc(
-	WDP_ALIGN_TOOLBAR, 0, 0,
+	WDP_ALIGN_TOOLBAR, "toolbar_air", 0, 0,
 	WC_BUILD_TOOLBAR, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_air_toolbar_widgets, lengthof(_nested_air_toolbar_widgets)
@@ -555,7 +555,7 @@ static const NWidgetPart _nested_build_airport_widgets[] = {
 };
 
 static WindowDesc _build_airport_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "build_station_air", 0, 0,
 	WC_BUILD_STATION, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_build_airport_widgets, lengthof(_nested_build_airport_widgets)
diff --git a/src/autoreplace_gui.cpp b/src/autoreplace_gui.cpp
index 7a1b8b297..547b2b0e8 100644
--- a/src/autoreplace_gui.cpp
+++ b/src/autoreplace_gui.cpp
@@ -564,7 +564,7 @@ static const NWidgetPart _nested_replace_rail_vehicle_widgets[] = {
 };
 
 static WindowDesc _replace_rail_vehicle_desc(
-	WDP_AUTO, 500, 140,
+	WDP_AUTO, "replace_vehicle_train", 500, 140,
 	WC_REPLACE_VEHICLE, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_replace_rail_vehicle_widgets, lengthof(_nested_replace_rail_vehicle_widgets)
@@ -596,7 +596,7 @@ static const NWidgetPart _nested_replace_vehicle_widgets[] = {
 };
 
 static WindowDesc _replace_vehicle_desc(
-	WDP_AUTO, 456, 118,
+	WDP_AUTO, "replace_vehicle", 456, 118,
 	WC_REPLACE_VEHICLE, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_replace_vehicle_widgets, lengthof(_nested_replace_vehicle_widgets)
diff --git a/src/bootstrap_gui.cpp b/src/bootstrap_gui.cpp
index bfcf7eead..a4ad86182 100644
--- a/src/bootstrap_gui.cpp
+++ b/src/bootstrap_gui.cpp
@@ -38,7 +38,7 @@ static const struct NWidgetPart _background_widgets[] = {
  * Window description for the background window to prevent smearing.
  */
 static WindowDesc _background_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_BOOTSTRAP, WC_NONE,
 	0,
 	_background_widgets, lengthof(_background_widgets)
@@ -71,7 +71,7 @@ static const NWidgetPart _nested_boostrap_download_status_window_widgets[] = {
 
 /** Window description for the download window */
 static WindowDesc _bootstrap_download_status_window_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_NETWORK_STATUS_WINDOW, WC_NONE,
 	WDF_MODAL,
 	_nested_boostrap_download_status_window_widgets, lengthof(_nested_boostrap_download_status_window_widgets)
@@ -116,7 +116,7 @@ static const NWidgetPart _bootstrap_query_widgets[] = {
 
 /** The window description for the query. */
 static WindowDesc _bootstrap_query_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_CONFIRM_POPUP_QUERY, WC_NONE,
 	0,
 	_bootstrap_query_widgets, lengthof(_bootstrap_query_widgets)
diff --git a/src/bridge_gui.cpp b/src/bridge_gui.cpp
index e6a0812a5..79d4e068c 100644
--- a/src/bridge_gui.cpp
+++ b/src/bridge_gui.cpp
@@ -352,7 +352,7 @@ static const NWidgetPart _nested_build_bridge_widgets[] = {
 
 /** Window definition for the rail bridge selection window. */
 static WindowDesc _build_bridge_desc(
-	WDP_AUTO, 200, 114,
+	WDP_AUTO, "build_bridge", 200, 114,
 	WC_BUILD_BRIDGE, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_build_bridge_widgets, lengthof(_nested_build_bridge_widgets)
diff --git a/src/build_vehicle_gui.cpp b/src/build_vehicle_gui.cpp
index 9698e22eb..e9fdb9a36 100644
--- a/src/build_vehicle_gui.cpp
+++ b/src/build_vehicle_gui.cpp
@@ -1405,7 +1405,7 @@ struct BuildVehicleWindow : Window {
 };
 
 static WindowDesc _build_vehicle_desc(
-	WDP_AUTO, 240, 268,
+	WDP_AUTO, "build_vehicle", 240, 268,
 	WC_BUILD_VEHICLE, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_build_vehicle_widgets, lengthof(_nested_build_vehicle_widgets)
diff --git a/src/cheat_gui.cpp b/src/cheat_gui.cpp
index ac42cf913..47c34566f 100644
--- a/src/cheat_gui.cpp
+++ b/src/cheat_gui.cpp
@@ -349,7 +349,7 @@ struct CheatWindow : Window {
 
 /** Window description of the cheats GUI. */
 static WindowDesc _cheats_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "cheats", 0, 0,
 	WC_CHEATS, WC_NONE,
 	0,
 	_nested_cheat_widgets, lengthof(_nested_cheat_widgets)
diff --git a/src/company_gui.cpp b/src/company_gui.cpp
index 8ace49875..b763aa363 100644
--- a/src/company_gui.cpp
+++ b/src/company_gui.cpp
@@ -464,7 +464,7 @@ struct CompanyFinancesWindow : Window {
 Money CompanyFinancesWindow::max_money = INT32_MAX;
 
 static WindowDesc _company_finances_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "company_finances", 0, 0,
 	WC_FINANCES, WC_NONE,
 	0,
 	_nested_company_finances_widgets, lengthof(_nested_company_finances_widgets)
@@ -842,7 +842,7 @@ static const NWidgetPart _nested_select_company_livery_widgets [] = {
 };
 
 static WindowDesc _select_company_livery_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "company_livery", 0, 0,
 	WC_COMPANY_COLOUR, WC_NONE,
 	0,
 	_nested_select_company_livery_widgets, lengthof(_nested_select_company_livery_widgets)
@@ -1480,7 +1480,7 @@ const StringID SelectCompanyManagerFaceWindow::PART_TEXTS[] = {
 
 /** Company manager face selection window description */
 static WindowDesc _select_company_manager_face_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "company_face", 0, 0,
 	WC_COMPANY_MANAGER_FACE, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_select_company_manager_face_widgets, lengthof(_nested_select_company_manager_face_widgets)
@@ -1834,7 +1834,7 @@ struct CompanyInfrastructureWindow : Window
 };
 
 static WindowDesc _company_infrastructure_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "company_infrastructure", 0, 0,
 	WC_COMPANY_INFRASTRUCTURE, WC_NONE,
 	0,
 	_nested_company_infrastructure_widgets, lengthof(_nested_company_infrastructure_widgets)
@@ -2411,7 +2411,7 @@ struct CompanyWindow : Window
 };
 
 static WindowDesc _company_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "company", 0, 0,
 	WC_COMPANY, WC_NONE,
 	0,
 	_nested_company_widgets, lengthof(_nested_company_widgets)
@@ -2523,7 +2523,7 @@ static const NWidgetPart _nested_buy_company_widgets[] = {
 };
 
 static WindowDesc _buy_company_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, NULL, 0, 0,
 	WC_BUY_COMPANY, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_buy_company_widgets, lengthof(_nested_buy_company_widgets)
diff --git a/src/console_gui.cpp b/src/console_gui.cpp
index 5787a5089..33e2ed1c5 100644
--- a/src/console_gui.cpp
+++ b/src/console_gui.cpp
@@ -159,7 +159,7 @@ static const struct NWidgetPart _nested_console_window_widgets[] = {
 };
 
 static WindowDesc _console_window_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_CONSOLE, WC_NONE,
 	0,
 	_nested_console_window_widgets, lengthof(_nested_console_window_widgets)
diff --git a/src/date_gui.cpp b/src/date_gui.cpp
index 771d0e1e0..1287c4463 100644
--- a/src/date_gui.cpp
+++ b/src/date_gui.cpp
@@ -195,7 +195,7 @@ static const NWidgetPart _nested_set_date_widgets[] = {
 
 /** Description of the date setting window. */
 static WindowDesc _set_date_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_SET_DATE, WC_NONE,
 	0,
 	_nested_set_date_widgets, lengthof(_nested_set_date_widgets)
diff --git a/src/depot_gui.cpp b/src/depot_gui.cpp
index 27280dadb..e897fec21 100644
--- a/src/depot_gui.cpp
+++ b/src/depot_gui.cpp
@@ -79,28 +79,28 @@ static const NWidgetPart _nested_train_depot_widgets[] = {
 };
 
 static WindowDesc _train_depot_desc(
-	WDP_AUTO, 362, 123,
+	WDP_AUTO, "depot_train", 362, 123,
 	WC_VEHICLE_DEPOT, WC_NONE,
 	0,
 	_nested_train_depot_widgets, lengthof(_nested_train_depot_widgets)
 );
 
 static WindowDesc _road_depot_desc(
-	WDP_AUTO, 316, 97,
+	WDP_AUTO, "depot_roadveh", 316, 97,
 	WC_VEHICLE_DEPOT, WC_NONE,
 	0,
 	_nested_train_depot_widgets, lengthof(_nested_train_depot_widgets)
 );
 
 static WindowDesc _ship_depot_desc(
-	WDP_AUTO, 306, 99,
+	WDP_AUTO, "depot_ship", 306, 99,
 	WC_VEHICLE_DEPOT, WC_NONE,
 	0,
 	_nested_train_depot_widgets, lengthof(_nested_train_depot_widgets)
 );
 
 static WindowDesc _aircraft_depot_desc(
-	WDP_AUTO, 332, 99,
+	WDP_AUTO, "depot_aircraft", 332, 99,
 	WC_VEHICLE_DEPOT, WC_NONE,
 	0,
 	_nested_train_depot_widgets, lengthof(_nested_train_depot_widgets)
diff --git a/src/dock_gui.cpp b/src/dock_gui.cpp
index d6fbd53f2..0e4f8ed9f 100644
--- a/src/dock_gui.cpp
+++ b/src/dock_gui.cpp
@@ -314,7 +314,7 @@ static const NWidgetPart _nested_build_docks_toolbar_widgets[] = {
 };
 
 static WindowDesc _build_docks_toolbar_desc(
-	WDP_ALIGN_TOOLBAR, 0, 0,
+	WDP_ALIGN_TOOLBAR, "toolbar_water", 0, 0,
 	WC_BUILD_TOOLBAR, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_build_docks_toolbar_widgets, lengthof(_nested_build_docks_toolbar_widgets)
@@ -366,7 +366,7 @@ static const NWidgetPart _nested_build_docks_scen_toolbar_widgets[] = {
 
 /** Window definition for the build docks in scenario editor window. */
 static WindowDesc _build_docks_scen_toolbar_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "toolbar_water_scen", 0, 0,
 	WC_SCEN_BUILD_TOOLBAR, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_build_docks_scen_toolbar_widgets, lengthof(_nested_build_docks_scen_toolbar_widgets)
@@ -466,7 +466,7 @@ static const NWidgetPart _nested_build_dock_station_widgets[] = {
 };
 
 static WindowDesc _build_dock_station_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, NULL, 0, 0,
 	WC_BUILD_STATION, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_build_dock_station_widgets, lengthof(_nested_build_dock_station_widgets)
@@ -543,7 +543,7 @@ static const NWidgetPart _nested_build_docks_depot_widgets[] = {
 };
 
 static WindowDesc _build_docks_depot_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, NULL, 0, 0,
 	WC_BUILD_DEPOT, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_build_docks_depot_widgets, lengthof(_nested_build_docks_depot_widgets)
diff --git a/src/engine_gui.cpp b/src/engine_gui.cpp
index 8f4252f85..6ee47692d 100644
--- a/src/engine_gui.cpp
+++ b/src/engine_gui.cpp
@@ -121,7 +121,7 @@ struct EnginePreviewWindow : Window {
 };
 
 static WindowDesc _engine_preview_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, "engine_preview", 0, 0,
 	WC_ENGINE_PREVIEW, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_engine_preview_widgets, lengthof(_nested_engine_preview_widgets)
diff --git a/src/error_gui.cpp b/src/error_gui.cpp
index df5aa7b6d..ccbc18850 100644
--- a/src/error_gui.cpp
+++ b/src/error_gui.cpp
@@ -40,7 +40,7 @@ static const NWidgetPart _nested_errmsg_widgets[] = {
 };
 
 static WindowDesc _errmsg_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, "error", 0, 0,
 	WC_ERRMSG, WC_NONE,
 	0,
 	_nested_errmsg_widgets, lengthof(_nested_errmsg_widgets)
@@ -60,7 +60,7 @@ static const NWidgetPart _nested_errmsg_face_widgets[] = {
 };
 
 static WindowDesc _errmsg_face_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, "error_face", 0, 0,
 	WC_ERRMSG, WC_NONE,
 	0,
 	_nested_errmsg_face_widgets, lengthof(_nested_errmsg_face_widgets)
diff --git a/src/fios_gui.cpp b/src/fios_gui.cpp
index e186c7e12..75a9dd2fb 100644
--- a/src/fios_gui.cpp
+++ b/src/fios_gui.cpp
@@ -697,7 +697,7 @@ public:
 
 /** Load game/scenario */
 static WindowDesc _load_dialog_desc(
-	WDP_CENTER, 500, 294,
+	WDP_CENTER, "load_game", 500, 294,
 	WC_SAVELOAD, WC_NONE,
 	0,
 	_nested_load_dialog_widgets, lengthof(_nested_load_dialog_widgets)
@@ -705,7 +705,7 @@ static WindowDesc _load_dialog_desc(
 
 /** Load heightmap */
 static WindowDesc _load_heightmap_dialog_desc(
-	WDP_CENTER, 257, 320,
+	WDP_CENTER, "load_heightmap", 257, 320,
 	WC_SAVELOAD, WC_NONE,
 	0,
 	_nested_load_heightmap_dialog_widgets, lengthof(_nested_load_heightmap_dialog_widgets)
@@ -713,7 +713,7 @@ static WindowDesc _load_heightmap_dialog_desc(
 
 /** Save game/scenario */
 static WindowDesc _save_dialog_desc(
-	WDP_CENTER, 500, 294,
+	WDP_CENTER, "save_game", 500, 294,
 	WC_SAVELOAD, WC_NONE,
 	0,
 	_nested_save_dialog_widgets, lengthof(_nested_save_dialog_widgets)
diff --git a/src/genworld_gui.cpp b/src/genworld_gui.cpp
index f5da7f950..b1ecc68ee 100644
--- a/src/genworld_gui.cpp
+++ b/src/genworld_gui.cpp
@@ -797,14 +797,14 @@ struct GenerateLandscapeWindow : public Window {
 };
 
 static WindowDesc _generate_landscape_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_GENERATE_LANDSCAPE, WC_NONE,
 	0,
 	_nested_generate_landscape_widgets, lengthof(_nested_generate_landscape_widgets)
 );
 
 static WindowDesc _heightmap_load_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_GENERATE_LANDSCAPE, WC_NONE,
 	0,
 	_nested_heightmap_load_widgets, lengthof(_nested_heightmap_load_widgets)
@@ -1098,7 +1098,7 @@ static const NWidgetPart _nested_create_scenario_widgets[] = {
 };
 
 static WindowDesc _create_scenario_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_GENERATE_LANDSCAPE, WC_NONE,
 	0,
 	_nested_create_scenario_widgets, lengthof(_nested_create_scenario_widgets)
@@ -1126,7 +1126,7 @@ static const NWidgetPart _nested_generate_progress_widgets[] = {
 
 
 static WindowDesc _generate_progress_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_MODAL_PROGRESS, WC_NONE,
 	0,
 	_nested_generate_progress_widgets, lengthof(_nested_generate_progress_widgets)
diff --git a/src/goal_gui.cpp b/src/goal_gui.cpp
index e738617a6..32c7b78ec 100644
--- a/src/goal_gui.cpp
+++ b/src/goal_gui.cpp
@@ -231,7 +231,7 @@ static const NWidgetPart _nested_goals_list_widgets[] = {
 };
 
 static WindowDesc _goals_list_desc(
-	WDP_AUTO, 500, 127,
+	WDP_AUTO, "list_goals", 500, 127,
 	WC_GOALS_LIST, WC_NONE,
 	0,
 	_nested_goals_list_widgets, lengthof(_nested_goals_list_widgets)
@@ -360,7 +360,7 @@ static const NWidgetPart _nested_goal_question_widgets[] = {
 };
 
 static WindowDesc _goal_question_list_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_GOAL_QUESTION, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_goal_question_widgets, lengthof(_nested_goal_question_widgets)
diff --git a/src/graph_gui.cpp b/src/graph_gui.cpp
index 7a4abdeaf..3cb5adfda 100644
--- a/src/graph_gui.cpp
+++ b/src/graph_gui.cpp
@@ -141,7 +141,7 @@ static const NWidgetPart _nested_graph_legend_widgets[] = {
 };
 
 static WindowDesc _graph_legend_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "graph_legend", 0, 0,
 	WC_GRAPH_LEGEND, WC_NONE,
 	0,
 	_nested_graph_legend_widgets, lengthof(_nested_graph_legend_widgets)
@@ -643,7 +643,7 @@ static const NWidgetPart _nested_operating_profit_widgets[] = {
 };
 
 static WindowDesc _operating_profit_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "graph_operating_profit", 0, 0,
 	WC_OPERATING_PROFIT, WC_NONE,
 	0,
 	_nested_operating_profit_widgets, lengthof(_nested_operating_profit_widgets)
@@ -693,7 +693,7 @@ static const NWidgetPart _nested_income_graph_widgets[] = {
 };
 
 static WindowDesc _income_graph_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "graph_income", 0, 0,
 	WC_INCOME_GRAPH, WC_NONE,
 	0,
 	_nested_income_graph_widgets, lengthof(_nested_income_graph_widgets)
@@ -741,7 +741,7 @@ static const NWidgetPart _nested_delivered_cargo_graph_widgets[] = {
 };
 
 static WindowDesc _delivered_cargo_graph_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "graph_delivered_cargo", 0, 0,
 	WC_DELIVERED_CARGO, WC_NONE,
 	0,
 	_nested_delivered_cargo_graph_widgets, lengthof(_nested_delivered_cargo_graph_widgets)
@@ -796,7 +796,7 @@ static const NWidgetPart _nested_performance_history_widgets[] = {
 };
 
 static WindowDesc _performance_history_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "graph_performance", 0, 0,
 	WC_PERFORMANCE_HISTORY, WC_NONE,
 	0,
 	_nested_performance_history_widgets, lengthof(_nested_performance_history_widgets)
@@ -844,7 +844,7 @@ static const NWidgetPart _nested_company_value_graph_widgets[] = {
 };
 
 static WindowDesc _company_value_graph_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "graph_company_value", 0, 0,
 	WC_COMPANY_VALUE, WC_NONE,
 	0,
 	_nested_company_value_graph_widgets, lengthof(_nested_company_value_graph_widgets)
@@ -1074,7 +1074,7 @@ static const NWidgetPart _nested_cargo_payment_rates_widgets[] = {
 };
 
 static WindowDesc _cargo_payment_rates_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "graph_cargo_payment_rates", 0, 0,
 	WC_PAYMENT_RATES, WC_NONE,
 	0,
 	_nested_cargo_payment_rates_widgets, lengthof(_nested_cargo_payment_rates_widgets)
@@ -1263,7 +1263,7 @@ static const NWidgetPart _nested_company_league_widgets[] = {
 };
 
 static WindowDesc _company_league_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "league", 0, 0,
 	WC_COMPANY_LEAGUE, WC_NONE,
 	0,
 	_nested_company_league_widgets, lengthof(_nested_company_league_widgets)
@@ -1562,7 +1562,7 @@ static const NWidgetPart _nested_performance_rating_detail_widgets[] = {
 };
 
 static WindowDesc _performance_rating_detail_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "league_details", 0, 0,
 	WC_PERFORMANCE_DETAIL, WC_NONE,
 	0,
 	_nested_performance_rating_detail_widgets, lengthof(_nested_performance_rating_detail_widgets)
diff --git a/src/group_gui.cpp b/src/group_gui.cpp
index a37a056d3..91fd9046c 100644
--- a/src/group_gui.cpp
+++ b/src/group_gui.cpp
@@ -799,14 +799,14 @@ public:
 
 
 static WindowDesc _other_group_desc(
-	WDP_AUTO, 460, 246,
+	WDP_AUTO, "list_groups", 460, 246,
 	WC_INVALID, WC_NONE,
 	0,
 	_nested_group_widgets, lengthof(_nested_group_widgets)
 );
 
 static WindowDesc _train_group_desc(
-	WDP_AUTO, 525, 246,
+	WDP_AUTO, "list_groups_train", 525, 246,
 	WC_TRAINS_LIST, WC_NONE,
 	0,
 	_nested_group_widgets, lengthof(_nested_group_widgets)
diff --git a/src/highscore_gui.cpp b/src/highscore_gui.cpp
index 50bb33c5e..5485866aa 100644
--- a/src/highscore_gui.cpp
+++ b/src/highscore_gui.cpp
@@ -204,14 +204,14 @@ static const NWidgetPart _nested_highscore_widgets[] = {
 };
 
 static WindowDesc _highscore_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_HIGHSCORE, WC_NONE,
 	0,
 	_nested_highscore_widgets, lengthof(_nested_highscore_widgets)
 );
 
 static WindowDesc _endgame_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_ENDSCREEN, WC_NONE,
 	0,
 	_nested_highscore_widgets, lengthof(_nested_highscore_widgets)
diff --git a/src/industry_gui.cpp b/src/industry_gui.cpp
index 356c6b77b..b7f50f248 100644
--- a/src/industry_gui.cpp
+++ b/src/industry_gui.cpp
@@ -188,7 +188,7 @@ static const NWidgetPart _nested_build_industry_widgets[] = {
 
 /** Window definition of the dynamic place industries gui */
 static WindowDesc _build_industry_desc(
-	WDP_AUTO, 170, 212,
+	WDP_AUTO, "build_industry", 170, 212,
 	WC_BUILD_INDUSTRY, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_build_industry_widgets, lengthof(_nested_build_industry_widgets)
@@ -1018,7 +1018,7 @@ static const NWidgetPart _nested_industry_view_widgets[] = {
 
 /** Window definition of the view industry gui */
 static WindowDesc _industry_view_desc(
-	WDP_AUTO, 260, 120,
+	WDP_AUTO, "view_industry", 260, 120,
 	WC_INDUSTRY_VIEW, WC_NONE,
 	0,
 	_nested_industry_view_widgets, lengthof(_nested_industry_view_widgets)
@@ -1389,7 +1389,7 @@ const StringID IndustryDirectoryWindow::sorter_names[] = {
 
 /** Window definition of the industry directory gui */
 static WindowDesc _industry_directory_desc(
-	WDP_AUTO, 428, 190,
+	WDP_AUTO, "list_industries", 428, 190,
 	WC_INDUSTRY_DIRECTORY, WC_NONE,
 	0,
 	_nested_industry_directory_widgets, lengthof(_nested_industry_directory_widgets)
@@ -1430,7 +1430,7 @@ static const NWidgetPart _nested_industry_cargoes_widgets[] = {
 
 /** Window description for the industry cargoes window. */
 static WindowDesc _industry_cargoes_desc(
-	WDP_AUTO, 300, 210,
+	WDP_AUTO, "industry_cargoes", 300, 210,
 	WC_INDUSTRY_CARGOES, WC_NONE,
 	0,
 	_nested_industry_cargoes_widgets, lengthof(_nested_industry_cargoes_widgets)
diff --git a/src/intro_gui.cpp b/src/intro_gui.cpp
index 3148b6360..5d1305894 100644
--- a/src/intro_gui.cpp
+++ b/src/intro_gui.cpp
@@ -247,7 +247,7 @@ static const NWidgetPart _nested_select_game_widgets[] = {
 };
 
 static WindowDesc _select_game_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_SELECT_GAME, WC_NONE,
 	0,
 	_nested_select_game_widgets, lengthof(_nested_select_game_widgets)
diff --git a/src/linkgraph/linkgraph_gui.cpp b/src/linkgraph/linkgraph_gui.cpp
index 1fd852c5e..b69d18411 100644
--- a/src/linkgraph/linkgraph_gui.cpp
+++ b/src/linkgraph/linkgraph_gui.cpp
@@ -381,7 +381,7 @@ assert_compile(WID_LGL_SATURATION_LAST - WID_LGL_SATURATION_FIRST ==
 		lengthof(LinkGraphOverlay::LINK_COLOURS) - 1);
 
 static WindowDesc _linkgraph_legend_desc(
-	WDP_MANUAL, 300, 314,
+	WDP_MANUAL, "toolbar_linkgraph", 300, 314,
 	WC_LINKGRAPH_LEGEND, WC_NONE,
 	0,
 	_nested_linkgraph_legend_widgets, lengthof(_nested_linkgraph_legend_widgets)
diff --git a/src/main_gui.cpp b/src/main_gui.cpp
index 5a1f57449..99857bff7 100644
--- a/src/main_gui.cpp
+++ b/src/main_gui.cpp
@@ -207,7 +207,7 @@ static const struct NWidgetPart _nested_main_window_widgets[] = {
 };
 
 static WindowDesc _main_window_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_MAIN_WINDOW, WC_NONE,
 	0,
 	_nested_main_window_widgets, lengthof(_nested_main_window_widgets)
diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
index d07254975..7dd1c71ff 100644
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -49,7 +49,7 @@ static const NWidgetPart _nested_land_info_widgets[] = {
 };
 
 static WindowDesc _land_info_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "land_info", 0, 0,
 	WC_LAND_INFO, WC_NONE,
 	0,
 	_nested_land_info_widgets, lengthof(_nested_land_info_widgets)
@@ -366,7 +366,7 @@ static const NWidgetPart _nested_about_widgets[] = {
 };
 
 static WindowDesc _about_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_GAME_OPTIONS, WC_NONE,
 	0,
 	_nested_about_widgets, lengthof(_nested_about_widgets)
@@ -616,7 +616,7 @@ static const NWidgetPart _nested_tooltips_widgets[] = {
 };
 
 static WindowDesc _tool_tips_desc(
-	WDP_MANUAL, 0, 0, // Coordinates and sizes are not used,
+	WDP_MANUAL, NULL, 0, 0, // Coordinates and sizes are not used,
 	WC_TOOLTIPS, WC_NONE,
 	0,
 	_nested_tooltips_widgets, lengthof(_nested_tooltips_widgets)
@@ -919,7 +919,7 @@ static const NWidgetPart _nested_query_string_widgets[] = {
 };
 
 static WindowDesc _query_string_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, "query_string", 0, 0,
 	WC_QUERY_STRING, WC_NONE,
 	0,
 	_nested_query_string_widgets, lengthof(_nested_query_string_widgets)
@@ -1060,7 +1060,7 @@ static const NWidgetPart _nested_query_widgets[] = {
 };
 
 static WindowDesc _query_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_CONFIRM_POPUP_QUERY, WC_NONE,
 	WDF_MODAL,
 	_nested_query_widgets, lengthof(_nested_query_widgets)
diff --git a/src/music_gui.cpp b/src/music_gui.cpp
index 3f57da964..aabf23082 100644
--- a/src/music_gui.cpp
+++ b/src/music_gui.cpp
@@ -496,7 +496,7 @@ static const NWidgetPart _nested_music_track_selection_widgets[] = {
 };
 
 static WindowDesc _music_track_selection_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "music_track", 0, 0,
 	WC_MUSIC_TRACK_SELECTION, WC_NONE,
 	0,
 	_nested_music_track_selection_widgets, lengthof(_nested_music_track_selection_widgets)
@@ -759,7 +759,7 @@ static const NWidgetPart _nested_music_window_widgets[] = {
 };
 
 static WindowDesc _music_window_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "music", 0, 0,
 	WC_MUSIC_WINDOW, WC_NONE,
 	0,
 	_nested_music_window_widgets, lengthof(_nested_music_window_widgets)
diff --git a/src/network/network_chat_gui.cpp b/src/network/network_chat_gui.cpp
index 5e7d11821..c6e2408cb 100644
--- a/src/network/network_chat_gui.cpp
+++ b/src/network/network_chat_gui.cpp
@@ -541,7 +541,7 @@ static const NWidgetPart _nested_chat_window_widgets[] = {
 
 /** The description of the chat window. */
 static WindowDesc _chat_window_desc(
-	WDP_MANUAL, 640, 14, // x, y, width, height
+	WDP_MANUAL, NULL, 640, 14, // x, y, width, height
 	WC_SEND_NETWORK_MSG, WC_NONE,
 	0,
 	_nested_chat_window_widgets, lengthof(_nested_chat_window_widgets)
diff --git a/src/network/network_content_gui.cpp b/src/network/network_content_gui.cpp
index ba30199ae..619526c17 100644
--- a/src/network/network_content_gui.cpp
+++ b/src/network/network_content_gui.cpp
@@ -92,7 +92,7 @@ static const NWidgetPart _nested_network_content_download_status_window_widgets[
 
 /** Window description for the download window */
 static WindowDesc _network_content_download_status_window_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_NETWORK_STATUS_WINDOW, WC_NONE,
 	WDF_MODAL,
 	_nested_network_content_download_status_window_widgets, lengthof(_nested_network_content_download_status_window_widgets)
@@ -1033,7 +1033,7 @@ static const NWidgetPart _nested_network_content_list_widgets[] = {
 
 /** Window description of the content list */
 static WindowDesc _network_content_list_desc(
-	WDP_CENTER, 630, 460,
+	WDP_CENTER, "list_content", 630, 460,
 	WC_NETWORK_WINDOW, WC_NONE,
 	0,
 	_nested_network_content_list_widgets, lengthof(_nested_network_content_list_widgets)
diff --git a/src/network/network_gui.cpp b/src/network/network_gui.cpp
index 80cdcda83..56cc35e4e 100644
--- a/src/network/network_gui.cpp
+++ b/src/network/network_gui.cpp
@@ -1012,7 +1012,7 @@ static const NWidgetPart _nested_network_game_widgets[] = {
 };
 
 static WindowDesc _network_game_window_desc(
-	WDP_CENTER, 1000, 730,
+	WDP_CENTER, "list_servers", 1000, 730,
 	WC_NETWORK_WINDOW, WC_NONE,
 	0,
 	_nested_network_game_widgets, lengthof(_nested_network_game_widgets)
@@ -1327,7 +1327,7 @@ static const NWidgetPart _nested_network_start_server_window_widgets[] = {
 };
 
 static WindowDesc _network_start_server_window_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_NETWORK_WINDOW, WC_NONE,
 	0,
 	_nested_network_start_server_window_widgets, lengthof(_nested_network_start_server_window_widgets)
@@ -1616,7 +1616,7 @@ static const NWidgetPart _nested_network_lobby_window_widgets[] = {
 };
 
 static WindowDesc _network_lobby_window_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_NETWORK_WINDOW, WC_NONE,
 	0,
 	_nested_network_lobby_window_widgets, lengthof(_nested_network_lobby_window_widgets)
@@ -1665,7 +1665,7 @@ static const NWidgetPart _nested_client_list_popup_widgets[] = {
 };
 
 static WindowDesc _client_list_popup_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, NULL, 0, 0,
 	WC_CLIENT_LIST_POPUP, WC_CLIENT_LIST,
 	0,
 	_nested_client_list_popup_widgets, lengthof(_nested_client_list_popup_widgets)
@@ -1841,7 +1841,7 @@ static const NWidgetPart _nested_client_list_widgets[] = {
 };
 
 static WindowDesc _client_list_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "list_clients", 0, 0,
 	WC_CLIENT_LIST, WC_NONE,
 	0,
 	_nested_client_list_widgets, lengthof(_nested_client_list_widgets)
@@ -2113,7 +2113,7 @@ static const NWidgetPart _nested_network_join_status_window_widgets[] = {
 };
 
 static WindowDesc _network_join_status_window_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_NETWORK_STATUS_WINDOW, WC_NONE,
 	WDF_MODAL,
 	_nested_network_join_status_window_widgets, lengthof(_nested_network_join_status_window_widgets)
@@ -2207,7 +2207,7 @@ static const NWidgetPart _nested_network_company_password_window_widgets[] = {
 };
 
 static WindowDesc _network_company_password_window_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, NULL, 0, 0,
 	WC_COMPANY_PASSWORD_WINDOW, WC_NONE,
 	0,
 	_nested_network_company_password_window_widgets, lengthof(_nested_network_company_password_window_widgets)
diff --git a/src/newgrf_debug_gui.cpp b/src/newgrf_debug_gui.cpp
index f4a6585a9..def656475 100644
--- a/src/newgrf_debug_gui.cpp
+++ b/src/newgrf_debug_gui.cpp
@@ -519,7 +519,7 @@ static const NWidgetPart _nested_newgrf_inspect_widgets[] = {
 };
 
 static WindowDesc _newgrf_inspect_desc(
-	WDP_AUTO, 400, 300,
+	WDP_AUTO, "newgrf_inspect", 400, 300,
 	WC_NEWGRF_INSPECT, WC_NONE,
 	0,
 	_nested_newgrf_inspect_widgets, lengthof(_nested_newgrf_inspect_widgets)
@@ -873,7 +873,7 @@ static const NWidgetPart _nested_sprite_aligner_widgets[] = {
 };
 
 static WindowDesc _sprite_aligner_desc(
-	WDP_AUTO, 400, 300,
+	WDP_AUTO, "sprite_aligner", 400, 300,
 	WC_SPRITE_ALIGNER, WC_NONE,
 	0,
 	_nested_sprite_aligner_widgets, lengthof(_nested_sprite_aligner_widgets)
diff --git a/src/newgrf_gui.cpp b/src/newgrf_gui.cpp
index 02aca44a3..59e39535b 100644
--- a/src/newgrf_gui.cpp
+++ b/src/newgrf_gui.cpp
@@ -529,7 +529,7 @@ static const NWidgetPart _nested_newgrf_parameter_widgets[] = {
 
 /** Window definition for the change grf parameters window */
 static WindowDesc _newgrf_parameters_desc(
-	WDP_CENTER, 500, 208,
+	WDP_CENTER, "settings_newgrf_config", 500, 208,
 	WC_GRF_PARAMETERS, WC_NONE,
 	0,
 	_nested_newgrf_parameter_widgets, lengthof(_nested_newgrf_parameter_widgets)
@@ -1878,7 +1878,7 @@ static const NWidgetPart _nested_newgrf_widgets[] = {
 
 /* Window definition of the manage newgrfs window */
 static WindowDesc _newgrf_desc(
-	WDP_CENTER, 300, 263,
+	WDP_CENTER, "settings_newgrf", 300, 263,
 	WC_GAME_OPTIONS, WC_NONE,
 	0,
 	_nested_newgrf_widgets, lengthof(_nested_newgrf_widgets)
@@ -1949,7 +1949,7 @@ static const NWidgetPart _nested_scan_progress_widgets[] = {
 
 /** Description of the widgets and other settings of the window. */
 static WindowDesc _scan_progress_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_MODAL_PROGRESS, WC_NONE,
 	0,
 	_nested_scan_progress_widgets, lengthof(_nested_scan_progress_widgets)
diff --git a/src/news_gui.cpp b/src/news_gui.cpp
index 67ef03678..97c31b0d1 100644
--- a/src/news_gui.cpp
+++ b/src/news_gui.cpp
@@ -90,7 +90,7 @@ static const NWidgetPart _nested_normal_news_widgets[] = {
 };
 
 static WindowDesc _normal_news_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_NEWS_WINDOW, WC_NONE,
 	0,
 	_nested_normal_news_widgets, lengthof(_nested_normal_news_widgets)
@@ -117,7 +117,7 @@ static const NWidgetPart _nested_vehicle_news_widgets[] = {
 };
 
 static WindowDesc _vehicle_news_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_NEWS_WINDOW, WC_NONE,
 	0,
 	_nested_vehicle_news_widgets, lengthof(_nested_vehicle_news_widgets)
@@ -148,7 +148,7 @@ static const NWidgetPart _nested_company_news_widgets[] = {
 };
 
 static WindowDesc _company_news_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_NEWS_WINDOW, WC_NONE,
 	0,
 	_nested_company_news_widgets, lengthof(_nested_company_news_widgets)
@@ -171,7 +171,7 @@ static const NWidgetPart _nested_thin_news_widgets[] = {
 };
 
 static WindowDesc _thin_news_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_NEWS_WINDOW, WC_NONE,
 	0,
 	_nested_thin_news_widgets, lengthof(_nested_thin_news_widgets)
@@ -195,7 +195,7 @@ static const NWidgetPart _nested_small_news_widgets[] = {
 };
 
 static WindowDesc _small_news_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_NEWS_WINDOW, WC_NONE,
 	0,
 	_nested_small_news_widgets, lengthof(_nested_small_news_widgets)
@@ -1110,7 +1110,7 @@ static const NWidgetPart _nested_message_history[] = {
 };
 
 static WindowDesc _message_history_desc(
-	WDP_AUTO, 400, 140,
+	WDP_AUTO, "list_news", 400, 140,
 	WC_MESSAGE_HISTORY, WC_NONE,
 	0,
 	_nested_message_history, lengthof(_nested_message_history)
diff --git a/src/object_gui.cpp b/src/object_gui.cpp
index 6e967a6fe..8af93120e 100644
--- a/src/object_gui.cpp
+++ b/src/object_gui.cpp
@@ -489,7 +489,7 @@ static const NWidgetPart _nested_build_object_widgets[] = {
 };
 
 static WindowDesc _build_object_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "build_object", 0, 0,
 	WC_BUILD_OBJECT, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_build_object_widgets, lengthof(_nested_build_object_widgets)
diff --git a/src/order_gui.cpp b/src/order_gui.cpp
index 04fb155d0..3061b4163 100644
--- a/src/order_gui.cpp
+++ b/src/order_gui.cpp
@@ -1594,7 +1594,7 @@ static const NWidgetPart _nested_orders_train_widgets[] = {
 };
 
 static WindowDesc _orders_train_desc(
-	WDP_AUTO, 384, 100,
+	WDP_AUTO, "view_vehicle_orders_train", 384, 100,
 	WC_VEHICLE_ORDERS, WC_VEHICLE_VIEW,
 	WDF_CONSTRUCTION,
 	_nested_orders_train_widgets, lengthof(_nested_orders_train_widgets)
@@ -1665,7 +1665,7 @@ static const NWidgetPart _nested_orders_widgets[] = {
 };
 
 static WindowDesc _orders_desc(
-	WDP_AUTO, 384, 100,
+	WDP_AUTO, "view_vehicle_orders", 384, 100,
 	WC_VEHICLE_ORDERS, WC_VEHICLE_VIEW,
 	WDF_CONSTRUCTION,
 	_nested_orders_widgets, lengthof(_nested_orders_widgets)
@@ -1690,7 +1690,7 @@ static const NWidgetPart _nested_other_orders_widgets[] = {
 };
 
 static WindowDesc _other_orders_desc(
-	WDP_AUTO, 384, 86,
+	WDP_AUTO, "view_vehicle_orders_competitor", 384, 86,
 	WC_VEHICLE_ORDERS, WC_VEHICLE_VIEW,
 	WDF_CONSTRUCTION,
 	_nested_other_orders_widgets, lengthof(_nested_other_orders_widgets)
diff --git a/src/osk_gui.cpp b/src/osk_gui.cpp
index c234192fe..5dafdef11 100644
--- a/src/osk_gui.cpp
+++ b/src/osk_gui.cpp
@@ -340,7 +340,7 @@ static const NWidgetPart _nested_osk_widgets[] = {
 };
 
 static WindowDesc _osk_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, "query_osk", 0, 0,
 	WC_OSK, WC_NONE,
 	0,
 	_nested_osk_widgets, lengthof(_nested_osk_widgets)
diff --git a/src/rail_gui.cpp b/src/rail_gui.cpp
index 5dd692c4e..b18a219f9 100644
--- a/src/rail_gui.cpp
+++ b/src/rail_gui.cpp
@@ -820,7 +820,7 @@ static const NWidgetPart _nested_build_rail_widgets[] = {
 };
 
 static WindowDesc _build_rail_desc(
-	WDP_ALIGN_TOOLBAR, 0, 0,
+	WDP_ALIGN_TOOLBAR, "toolbar_rail", 0, 0,
 	WC_BUILD_TOOLBAR, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_build_rail_widgets, lengthof(_nested_build_rail_widgets)
@@ -1428,7 +1428,7 @@ static const NWidgetPart _nested_station_builder_widgets[] = {
 
 /** High level window description of the station-build window (default & newGRF) */
 static WindowDesc _station_builder_desc(
-	WDP_AUTO, 350, 0,
+	WDP_AUTO, "build_station_rail", 350, 0,
 	WC_BUILD_STATION, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_station_builder_widgets, lengthof(_nested_station_builder_widgets)
@@ -1615,7 +1615,7 @@ static const NWidgetPart _nested_signal_builder_widgets[] = {
 
 /** Signal selection window description */
 static WindowDesc _signal_builder_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "build_signal", 0, 0,
 	WC_BUILD_SIGNAL, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_signal_builder_widgets, lengthof(_nested_signal_builder_widgets)
@@ -1692,7 +1692,7 @@ static const NWidgetPart _nested_build_depot_widgets[] = {
 };
 
 static WindowDesc _build_depot_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, NULL, 0, 0,
 	WC_BUILD_DEPOT, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_build_depot_widgets, lengthof(_nested_build_depot_widgets)
@@ -1785,7 +1785,7 @@ static const NWidgetPart _nested_build_waypoint_widgets[] = {
 };
 
 static WindowDesc _build_waypoint_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "build_waypoint", 0, 0,
 	WC_BUILD_WAYPOINT, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_build_waypoint_widgets, lengthof(_nested_build_waypoint_widgets)
diff --git a/src/road_gui.cpp b/src/road_gui.cpp
index 0927c2c4a..a44ed3a5e 100644
--- a/src/road_gui.cpp
+++ b/src/road_gui.cpp
@@ -714,7 +714,7 @@ static const NWidgetPart _nested_build_road_widgets[] = {
 };
 
 static WindowDesc _build_road_desc(
-	WDP_ALIGN_TOOLBAR, 0, 0,
+	WDP_ALIGN_TOOLBAR, "toolbar_road", 0, 0,
 	WC_BUILD_TOOLBAR, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_build_road_widgets, lengthof(_nested_build_road_widgets)
@@ -753,7 +753,7 @@ static const NWidgetPart _nested_build_tramway_widgets[] = {
 };
 
 static WindowDesc _build_tramway_desc(
-	WDP_ALIGN_TOOLBAR, 0, 0,
+	WDP_ALIGN_TOOLBAR, "toolbar_tramway", 0, 0,
 	WC_BUILD_TOOLBAR, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_build_tramway_widgets, lengthof(_nested_build_tramway_widgets)
@@ -813,7 +813,7 @@ static const NWidgetPart _nested_build_road_scen_widgets[] = {
 };
 
 static WindowDesc _build_road_scen_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "toolbar_road_scen", 0, 0,
 	WC_SCEN_BUILD_TOOLBAR, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_build_road_scen_widgets, lengthof(_nested_build_road_scen_widgets)
@@ -910,7 +910,7 @@ static const NWidgetPart _nested_build_road_depot_widgets[] = {
 };
 
 static WindowDesc _build_road_depot_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, NULL, 0, 0,
 	WC_BUILD_DEPOT, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_build_road_depot_widgets, lengthof(_nested_build_road_depot_widgets)
@@ -1064,7 +1064,7 @@ static const NWidgetPart _nested_rv_station_picker_widgets[] = {
 };
 
 static WindowDesc _rv_station_picker_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, NULL, 0, 0,
 	WC_BUS_STATION, WC_BUILD_TOOLBAR,
 	WDF_CONSTRUCTION,
 	_nested_rv_station_picker_widgets, lengthof(_nested_rv_station_picker_widgets)
diff --git a/src/settings_gui.cpp b/src/settings_gui.cpp
index 96e2d0fe7..1ec7b844e 100644
--- a/src/settings_gui.cpp
+++ b/src/settings_gui.cpp
@@ -663,7 +663,7 @@ static const NWidgetPart _nested_game_options_widgets[] = {
 };
 
 static WindowDesc _game_options_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, "settings_game", 0, 0,
 	WC_GAME_OPTIONS, WC_NONE,
 	0,
 	_nested_game_options_widgets, lengthof(_nested_game_options_widgets)
@@ -2262,7 +2262,7 @@ static const NWidgetPart _nested_settings_selection_widgets[] = {
 };
 
 static WindowDesc _settings_selection_desc(
-	WDP_CENTER, 510, 450,
+	WDP_CENTER, "settings", 510, 450,
 	WC_GAME_OPTIONS, WC_NONE,
 	0,
 	_nested_settings_selection_widgets, lengthof(_nested_settings_selection_widgets)
@@ -2555,7 +2555,7 @@ static const NWidgetPart _nested_cust_currency_widgets[] = {
 };
 
 static WindowDesc _cust_currency_desc(
-	WDP_CENTER, 0, 0,
+	WDP_CENTER, NULL, 0, 0,
 	WC_CUSTOM_CURRENCY, WC_NONE,
 	0,
 	_nested_cust_currency_widgets, lengthof(_nested_cust_currency_widgets)
diff --git a/src/signs_gui.cpp b/src/signs_gui.cpp
index 2290f621a..1ff2a7524 100644
--- a/src/signs_gui.cpp
+++ b/src/signs_gui.cpp
@@ -370,7 +370,7 @@ static const NWidgetPart _nested_sign_list_widgets[] = {
 };
 
 static WindowDesc _sign_list_desc(
-	WDP_AUTO, 358, 138,
+	WDP_AUTO, "list_signs", 358, 138,
 	WC_SIGN_LIST, WC_NONE,
 	0,
 	_nested_sign_list_widgets, lengthof(_nested_sign_list_widgets)
@@ -532,7 +532,7 @@ static const NWidgetPart _nested_query_sign_edit_widgets[] = {
 };
 
 static WindowDesc _query_sign_edit_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "query_sign", 0, 0,
 	WC_QUERY_STRING, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_query_sign_edit_widgets, lengthof(_nested_query_sign_edit_widgets)
diff --git a/src/smallmap_gui.cpp b/src/smallmap_gui.cpp
index bc984ce63..f79b0cec6 100644
--- a/src/smallmap_gui.cpp
+++ b/src/smallmap_gui.cpp
@@ -1777,7 +1777,7 @@ static const NWidgetPart _nested_smallmap_widgets[] = {
 };
 
 static WindowDesc _smallmap_desc(
-	WDP_AUTO, 484, 314,
+	WDP_AUTO, "smallmap", 484, 314,
 	WC_SMALLMAP, WC_NONE,
 	0,
 	_nested_smallmap_widgets, lengthof(_nested_smallmap_widgets)
diff --git a/src/station_gui.cpp b/src/station_gui.cpp
index c7c033fbf..f6519fc4b 100644
--- a/src/station_gui.cpp
+++ b/src/station_gui.cpp
@@ -712,7 +712,7 @@ static const NWidgetPart _nested_company_stations_widgets[] = {
 };
 
 static WindowDesc _company_stations_desc(
-	WDP_AUTO, 358, 162,
+	WDP_AUTO, "list_stations", 358, 162,
 	WC_STATION_LIST, WC_NONE,
 	0,
 	_nested_company_stations_widgets, lengthof(_nested_company_stations_widgets)
@@ -1184,7 +1184,7 @@ struct StationViewWindow : public Window {
 
 
 static WindowDesc _station_view_desc(
-	WDP_AUTO, 249, 110,
+	WDP_AUTO, "view_station", 249, 110,
 	WC_STATION_VIEW, WC_NONE,
 	0,
 	_nested_station_view_widgets, lengthof(_nested_station_view_widgets)
@@ -1428,7 +1428,7 @@ struct SelectStationWindow : Window {
 };
 
 static WindowDesc _select_station_desc(
-	WDP_AUTO, 200, 180,
+	WDP_AUTO, "build_station_join", 200, 180,
 	WC_SELECT_STATION, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_select_station_widgets, lengthof(_nested_select_station_widgets)
diff --git a/src/statusbar_gui.cpp b/src/statusbar_gui.cpp
index 9e24d781d..62799e18b 100644
--- a/src/statusbar_gui.cpp
+++ b/src/statusbar_gui.cpp
@@ -236,7 +236,7 @@ static const NWidgetPart _nested_main_status_widgets[] = {
 };
 
 static WindowDesc _main_status_desc(
-	WDP_MANUAL, 640, 12,
+	WDP_MANUAL, NULL, 640, 12,
 	WC_STATUS_BAR, WC_NONE,
 	WDF_NO_FOCUS,
 	_nested_main_status_widgets, lengthof(_nested_main_status_widgets)
diff --git a/src/subsidy_gui.cpp b/src/subsidy_gui.cpp
index a53a8b3ba..8506498b6 100644
--- a/src/subsidy_gui.cpp
+++ b/src/subsidy_gui.cpp
@@ -239,7 +239,7 @@ static const NWidgetPart _nested_subsidies_list_widgets[] = {
 };
 
 static WindowDesc _subsidies_list_desc(
-	WDP_AUTO, 500, 127,
+	WDP_AUTO, "list_subsidies", 500, 127,
 	WC_SUBSIDIES_LIST, WC_NONE,
 	0,
 	_nested_subsidies_list_widgets, lengthof(_nested_subsidies_list_widgets)
diff --git a/src/terraform_gui.cpp b/src/terraform_gui.cpp
index 22efd7a39..f3e1a005a 100644
--- a/src/terraform_gui.cpp
+++ b/src/terraform_gui.cpp
@@ -342,7 +342,7 @@ static const NWidgetPart _nested_terraform_widgets[] = {
 };
 
 static WindowDesc _terraform_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, "toolbar_landscape", 0, 0,
 	WC_SCEN_LAND_GEN, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_terraform_widgets, lengthof(_nested_terraform_widgets)
@@ -740,7 +740,7 @@ Hotkey<ScenarioEditorLandscapeGenerationWindow> ScenarioEditorLandscapeGeneratio
 Hotkey<ScenarioEditorLandscapeGenerationWindow> *_terraform_editor_hotkeys = ScenarioEditorLandscapeGenerationWindow::terraform_editor_hotkeys;
 
 static WindowDesc _scen_edit_land_gen_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "toolbar_landscape_scen", 0, 0,
 	WC_SCEN_LAND_GEN, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_scen_edit_land_gen_widgets, lengthof(_nested_scen_edit_land_gen_widgets)
diff --git a/src/textfile_gui.cpp b/src/textfile_gui.cpp
index 87b1add35..40fa471b2 100644
--- a/src/textfile_gui.cpp
+++ b/src/textfile_gui.cpp
@@ -43,7 +43,7 @@ static const NWidgetPart _nested_textfile_widgets[] = {
 
 /** Window definition for the textfile window */
 static WindowDesc _textfile_desc(
-	WDP_CENTER, 630, 460,
+	WDP_CENTER, "textfile", 630, 460,
 	WC_TEXTFILE, WC_NONE,
 	0,
 	_nested_textfile_widgets, lengthof(_nested_textfile_widgets)
diff --git a/src/timetable_gui.cpp b/src/timetable_gui.cpp
index 7bb8ca06c..1be6a89f0 100644
--- a/src/timetable_gui.cpp
+++ b/src/timetable_gui.cpp
@@ -690,7 +690,7 @@ static const NWidgetPart _nested_timetable_widgets[] = {
 };
 
 static WindowDesc _timetable_desc(
-	WDP_AUTO, 400, 130,
+	WDP_AUTO, "view_vehicle_timetable", 400, 130,
 	WC_VEHICLE_TIMETABLE, WC_VEHICLE_VIEW,
 	WDF_CONSTRUCTION,
 	_nested_timetable_widgets, lengthof(_nested_timetable_widgets)
diff --git a/src/toolbar_gui.cpp b/src/toolbar_gui.cpp
index 70326b682..5f041a39f 100644
--- a/src/toolbar_gui.cpp
+++ b/src/toolbar_gui.cpp
@@ -1787,7 +1787,7 @@ static const NWidgetPart _nested_toolbar_normal_widgets[] = {
 };
 
 static WindowDesc _toolb_normal_desc(
-	WDP_MANUAL, 640, 22,
+	WDP_MANUAL, NULL, 640, 22,
 	WC_MAIN_TOOLBAR, WC_NONE,
 	WDF_NO_FOCUS,
 	_nested_toolbar_normal_widgets, lengthof(_nested_toolbar_normal_widgets)
@@ -2096,7 +2096,7 @@ static const NWidgetPart _nested_toolb_scen_widgets[] = {
 };
 
 static WindowDesc _toolb_scen_desc(
-	WDP_MANUAL, 640, 22,
+	WDP_MANUAL, NULL, 640, 22,
 	WC_MAIN_TOOLBAR, WC_NONE,
 	WDF_NO_FOCUS,
 	_nested_toolb_scen_widgets, lengthof(_nested_toolb_scen_widgets)
diff --git a/src/town_gui.cpp b/src/town_gui.cpp
index 676061594..63f7be2b6 100644
--- a/src/town_gui.cpp
+++ b/src/town_gui.cpp
@@ -281,7 +281,7 @@ public:
 };
 
 static WindowDesc _town_authority_desc(
-	WDP_AUTO, 317, 222,
+	WDP_AUTO, "view_town_authority", 317, 222,
 	WC_TOWN_AUTHORITY, WC_NONE,
 	0,
 	_nested_town_authority_widgets, lengthof(_nested_town_authority_widgets)
@@ -551,7 +551,7 @@ static const NWidgetPart _nested_town_game_view_widgets[] = {
 };
 
 static WindowDesc _town_game_view_desc(
-	WDP_AUTO, 260, TownViewWindow::WID_TV_HEIGHT_NORMAL,
+	WDP_AUTO, "view_town", 260, TownViewWindow::WID_TV_HEIGHT_NORMAL,
 	WC_TOWN_VIEW, WC_NONE,
 	0,
 	_nested_town_game_view_widgets, lengthof(_nested_town_game_view_widgets)
@@ -582,7 +582,7 @@ static const NWidgetPart _nested_town_editor_view_widgets[] = {
 };
 
 static WindowDesc _town_editor_view_desc(
-	WDP_AUTO, 260, TownViewWindow::WID_TV_HEIGHT_NORMAL,
+	WDP_AUTO, "view_town_scen", 260, TownViewWindow::WID_TV_HEIGHT_NORMAL,
 	WC_TOWN_VIEW, WC_NONE,
 	0,
 	_nested_town_editor_view_widgets, lengthof(_nested_town_editor_view_widgets)
@@ -938,7 +938,7 @@ GUITownList::SortFunction * const TownDirectoryWindow::sorter_funcs[] = {
 };
 
 static WindowDesc _town_directory_desc(
-	WDP_AUTO, 208, 202,
+	WDP_AUTO, "list_towns", 208, 202,
 	WC_TOWN_DIRECTORY, WC_NONE,
 	0,
 	_nested_town_directory_widgets, lengthof(_nested_town_directory_widgets)
@@ -1179,7 +1179,7 @@ public:
 };
 
 static WindowDesc _found_town_desc(
-	WDP_AUTO, 160, 162,
+	WDP_AUTO, "build_town", 160, 162,
 	WC_FOUND_TOWN, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_found_town_widgets, lengthof(_nested_found_town_widgets)
diff --git a/src/transparency_gui.cpp b/src/transparency_gui.cpp
index 449969c50..9e00552b6 100644
--- a/src/transparency_gui.cpp
+++ b/src/transparency_gui.cpp
@@ -147,7 +147,7 @@ static const NWidgetPart _nested_transparency_widgets[] = {
 };
 
 static WindowDesc _transparency_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, "toolbar_transparency", 0, 0,
 	WC_TRANSPARENCY_TOOLBAR, WC_NONE,
 	0,
 	_nested_transparency_widgets, lengthof(_nested_transparency_widgets)
diff --git a/src/tree_gui.cpp b/src/tree_gui.cpp
index 9f8d9e189..d1429d144 100644
--- a/src/tree_gui.cpp
+++ b/src/tree_gui.cpp
@@ -239,7 +239,7 @@ static const NWidgetPart _nested_build_trees_widgets[] = {
 };
 
 static WindowDesc _build_trees_desc(
-	WDP_AUTO, 0, 0,
+	WDP_AUTO, "build_tree", 0, 0,
 	WC_BUILD_TREES, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_build_trees_widgets, lengthof(_nested_build_trees_widgets)
diff --git a/src/vehicle_gui.cpp b/src/vehicle_gui.cpp
index 3f3b736c1..248ccbaa0 100644
--- a/src/vehicle_gui.cpp
+++ b/src/vehicle_gui.cpp
@@ -1000,7 +1000,7 @@ static const NWidgetPart _nested_vehicle_refit_widgets[] = {
 };
 
 static WindowDesc _vehicle_refit_desc(
-	WDP_AUTO, 240, 174,
+	WDP_AUTO, "view_vehicle_refit", 240, 174,
 	WC_VEHICLE_REFIT, WC_VEHICLE_VIEW,
 	WDF_CONSTRUCTION,
 	_nested_vehicle_refit_widgets, lengthof(_nested_vehicle_refit_widgets)
@@ -1697,7 +1697,7 @@ public:
 };
 
 static WindowDesc _vehicle_list_desc(
-	WDP_AUTO, 260, 246,
+	WDP_AUTO, "list_vehicles", 260, 246,
 	WC_INVALID, WC_NONE,
 	0,
 	_nested_vehicle_list, lengthof(_nested_vehicle_list)
@@ -2202,7 +2202,7 @@ struct VehicleDetailsWindow : Window {
 
 /** Vehicle details window descriptor. */
 static WindowDesc _train_vehicle_details_desc(
-	WDP_AUTO, 405, 178,
+	WDP_AUTO, "view_vehicle_details_train", 405, 178,
 	WC_VEHICLE_DETAILS, WC_VEHICLE_VIEW,
 	0,
 	_nested_train_vehicle_details_widgets, lengthof(_nested_train_vehicle_details_widgets)
@@ -2210,7 +2210,7 @@ static WindowDesc _train_vehicle_details_desc(
 
 /** Vehicle details window descriptor for other vehicles than a train. */
 static WindowDesc _nontrain_vehicle_details_desc(
-	WDP_AUTO, 405, 113,
+	WDP_AUTO, "view_vehicle_details", 405, 113,
 	WC_VEHICLE_DETAILS, WC_VEHICLE_VIEW,
 	0,
 	_nested_nontrain_vehicle_details_widgets, lengthof(_nested_nontrain_vehicle_details_widgets)
@@ -2269,7 +2269,7 @@ static const NWidgetPart _nested_vehicle_view_widgets[] = {
 
 /** Vehicle view window descriptor for all vehicles but trains. */
 static WindowDesc _vehicle_view_desc(
-	WDP_AUTO, 250, 116,
+	WDP_AUTO, "view_vehicle", 250, 116,
 	WC_VEHICLE_VIEW, WC_NONE,
 	0,
 	_nested_vehicle_view_widgets, lengthof(_nested_vehicle_view_widgets)
@@ -2280,7 +2280,7 @@ static WindowDesc _vehicle_view_desc(
  *  default_height are different for train view.
  */
 static WindowDesc _train_view_desc(
-	WDP_AUTO, 250, 134,
+	WDP_AUTO, "view_vehicle_train", 250, 134,
 	WC_VEHICLE_VIEW, WC_NONE,
 	0,
 	_nested_vehicle_view_widgets, lengthof(_nested_vehicle_view_widgets)
diff --git a/src/viewport_gui.cpp b/src/viewport_gui.cpp
index 8330d12a1..5a81b7978 100644
--- a/src/viewport_gui.cpp
+++ b/src/viewport_gui.cpp
@@ -154,7 +154,7 @@ public:
 };
 
 static WindowDesc _extra_view_port_desc(
-	WDP_AUTO, 300, 268,
+	WDP_AUTO, "extra_viewport", 300, 268,
 	WC_EXTRA_VIEW_PORT, WC_NONE,
 	0,
 	_nested_extra_view_port_widgets, lengthof(_nested_extra_view_port_widgets)
diff --git a/src/waypoint_gui.cpp b/src/waypoint_gui.cpp
index f0d6239c3..0991fba42 100644
--- a/src/waypoint_gui.cpp
+++ b/src/waypoint_gui.cpp
@@ -171,7 +171,7 @@ static const NWidgetPart _nested_waypoint_view_widgets[] = {
 
 /** The description of the waypoint view. */
 static WindowDesc _waypoint_view_desc(
-	WDP_AUTO, 260, 118,
+	WDP_AUTO, "view_waypoint", 260, 118,
 	WC_WAYPOINT_VIEW, WC_NONE,
 	0,
 	_nested_waypoint_view_widgets, lengthof(_nested_waypoint_view_widgets)
diff --git a/src/widgets/dropdown.cpp b/src/widgets/dropdown.cpp
index b0beca0fe..4a1ac8f08 100644
--- a/src/widgets/dropdown.cpp
+++ b/src/widgets/dropdown.cpp
@@ -91,7 +91,7 @@ static const NWidgetPart _nested_dropdown_menu_widgets[] = {
 };
 
 static WindowDesc _dropdown_desc(
-	WDP_MANUAL, 0, 0,
+	WDP_MANUAL, NULL, 0, 0,
 	WC_DROPDOWN_MENU, WC_NONE,
 	0,
 	_nested_dropdown_menu_widgets, lengthof(_nested_dropdown_menu_widgets)
diff --git a/src/window.cpp b/src/window.cpp
index 8e6a05028..035050bcb 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -73,7 +73,7 @@ bool _mouse_hovering;      ///< The mouse is hovering over the same point.
 SpecialMouseMode _special_mouse_mode; ///< Mode of the mouse.
 
 /** Window description constructor. */
-WindowDesc::WindowDesc(WindowPosition def_pos, int16 def_width, int16 def_height,
+WindowDesc::WindowDesc(WindowPosition def_pos, const char *ini_key, int16 def_width, int16 def_height,
 			WindowClass window_class, WindowClass parent_class, uint32 flags,
 			const NWidgetPart *nwid_parts, int16 nwid_length) :
 	default_pos(def_pos),
@@ -81,6 +81,7 @@ WindowDesc::WindowDesc(WindowPosition def_pos, int16 def_width, int16 def_height
 	default_height(def_height),
 	cls(window_class),
 	parent_cls(parent_class),
+	ini_key(ini_key),
 	flags(flags),
 	nwid_parts(nwid_parts),
 	nwid_length(nwid_length)
diff --git a/src/window_gui.h b/src/window_gui.h
index c21475442..59df38052 100644
--- a/src/window_gui.h
+++ b/src/window_gui.h
@@ -165,7 +165,7 @@ Point GetToolbarAlignedWindowPosition(int window_width);
  */
 struct WindowDesc : ZeroedMemoryAllocator {
 
-	WindowDesc(WindowPosition default_pos, int16 def_width, int16 def_height,
+	WindowDesc(WindowPosition default_pos, const char *ini_key, int16 def_width, int16 def_height,
 			WindowClass window_class, WindowClass parent_class, uint32 flags,
 			const NWidgetPart *nwid_parts, int16 nwid_length);
 
@@ -176,6 +176,7 @@ struct WindowDesc : ZeroedMemoryAllocator {
 	int16 default_height;          ///< Preferred initial height of the window.
 	WindowClass cls;               ///< Class of the window, @see WindowClass.
 	WindowClass parent_cls;        ///< Class of the parent window. @see WindowClass
+	const char *ini_key;           ///< Key to store window defaults in openttd.cfg. \c NULL if nothing shall be stored.
 	uint32 flags;                  ///< Flags. @see WindowDefaultFlag
 	const NWidgetPart *nwid_parts; ///< Nested widget parts describing the window.
 	int16 nwid_length;             ///< Length of the #nwid_parts array.