Merge branch 'master' into jgrpp

# Conflicts:
#	.github/workflows/release-windows.yml
#	src/autoreplace_gui.cpp
#	src/cargotype.cpp
#	src/company_base.h
#	src/company_cmd.cpp
#	src/company_gui.cpp
#	src/currency.h
#	src/date_gui.cpp
#	src/dropdown.cpp
#	src/dropdown_func.h
#	src/dropdown_type.h
#	src/game/game_gui.cpp
#	src/genworld.cpp
#	src/genworld_gui.cpp
#	src/ground_vehicle.hpp
#	src/group_gui.cpp
#	src/house.h
#	src/industry_gui.cpp
#	src/network/network_client.cpp
#	src/network/network_server.cpp
#	src/network/network_type.h
#	src/newgrf_class_func.h
#	src/newgrf_house.cpp
#	src/newgrf_roadstop.h
#	src/openttd.cpp
#	src/order_gui.cpp
#	src/saveload/saveload.cpp
#	src/saveload/saveload.h
#	src/screenshot_gui.cpp
#	src/settings_gui.cpp
#	src/settings_type.h
#	src/slider.cpp
#	src/smallmap_gui.cpp
#	src/station_cmd.cpp
#	src/stdafx.h
#	src/survey.cpp
#	src/tile_map.h
#	src/town_cmd.cpp
#	src/town_gui.cpp
#	src/vehicle.cpp
#	src/vehicle_gui.cpp
#	src/vehicle_gui_base.h

src/sl/saveload.h

@@ -68,7 +68,8 @@ extern FileToSaveLoad _file_to_saveload;
 
 std::string GenerateDefaultSaveName();
 void SetSaveLoadError(StringID str);
-std::string GetSaveLoadErrorString();
+StringID GetSaveLoadErrorType();
+StringID GetSaveLoadErrorMessage();
 SaveOrLoadResult SaveOrLoad(const std::string &filename, SaveLoadOperation fop, DetailedFileType dft, Subdirectory sb, bool threaded = true, SaveModeFlags flags = SMF_NONE);
 void WaitTillSaved();
 void ProcessAsyncSaveFinish();