Merge branch 'master' into 1.5

Conflicts:
	src/ai/ai_gui.cpp
	src/build_vehicle_gui.cpp
	src/cheat_gui.cpp
	src/company_gui.cpp
	src/depot_gui.cpp
	src/dock_gui.cpp
	src/genworld_gui.cpp
	src/misc_gui.cpp
	src/network/network_content_gui.cpp
	src/network/network_gui.cpp
	src/newgrf_gui.cpp
	src/news_gui.cpp
	src/rail_gui.cpp
	src/road_gui.cpp
	src/settings_gui.cpp
	src/settings_gui.h
	src/station_gui.cpp
	src/table/settings.ini
	src/toolbar_gui.cpp
	src/toolbar_gui.h
	src/vehicle_gui.cpp
	src/video/sdl_v.cpp
	src/widget.cpp
	src/widgets/settings_widget.h

src/window_func.h

@@ -41,6 +41,7 @@ void InvalidateWindowClassesData(WindowClass cls, int data = 0, bool gui_scope =
 void DeleteNonVitalWindows();
 void DeleteAllNonVitalWindows();
 void DeleteConstructionWindows();
+void DeleteToolbarLinkedWindows();
 void HideVitalWindows();
 void ShowVitalWindows();