Merge branch 'master' into jgrpp

# Conflicts:
#	.github/workflows/ci-build.yml
#	src/ai/ai_gui.cpp
#	src/blitter/32bpp_optimized.cpp
#	src/blitter/32bpp_simple.cpp
#	src/blitter/32bpp_sse2.cpp
#	src/blitter/8bpp_optimized.cpp
#	src/blitter/8bpp_simple.cpp
#	src/blitter/null.cpp
#	src/blitter/null.hpp
#	src/company_gui.cpp
#	src/game/game_gui.cpp
#	src/genworld_gui.cpp
#	src/gfx.cpp
#	src/gfx_func.h
#	src/graph_gui.cpp
#	src/industry_gui.cpp
#	src/linkgraph/linkgraphjob.cpp
#	src/network/network_gui.cpp
#	src/newgrf_debug_gui.cpp
#	src/openttd.cpp
#	src/pathfinder/npf/aystar.h
#	src/road_gui.cpp
#	src/saveload/order_sl.cpp
#	src/saveload/saveload.cpp
#	src/saveload/saveload.h
#	src/script/api/script_log.cpp
#	src/script/api/script_town.cpp
#	src/script/script_gui.cpp
#	src/settings.cpp
#	src/settings_gui.cpp
#	src/settings_table.cpp
#	src/settings_type.h
#	src/smallmap_gui.cpp
#	src/sortlist_type.h
#	src/spritecache.cpp
#	src/spriteloader/grf.cpp
#	src/spriteloader/grf.hpp
#	src/spriteloader/spriteloader.hpp
#	src/station_cmd.cpp
#	src/station_cmd.h
#	src/station_gui.cpp
#	src/strings.cpp
#	src/toolbar_gui.cpp
#	src/town_cmd.cpp
#	src/town_gui.cpp
#	src/vehicle_gui.cpp
#	src/vehicle_gui_base.h
#	src/video/opengl.cpp
#	src/video/opengl.h
#	src/widgets/dropdown.cpp
#	src/widgets/dropdown_type.h
#	src/window_gui.h

src/settings.cpp

@@ -1324,13 +1324,8 @@ static void ZoomMinMaxChanged(int32 new_value)
 	extern void UpdateFontHeightCache();
 	ConstrainAllViewportsZoom();
 	GfxClearSpriteCache();
-	if (_settings_client.gui.zoom_min > _gui_zoom) {
-		/* Restrict GUI zoom if it is no longer available. */
-		_gui_zoom = _settings_client.gui.zoom_min;
-		UpdateCursorSize();
-		UpdateRouteStepSpriteSize();
-		UpdateFontHeightCache();
-		LoadStringWidthTable();
+	InvalidateWindowClassesData(WC_SPRITE_ALIGNER);
+	if (AdjustGUIZoom(AGZM_MANUAL)) {
 		ReInitAllWindows(false);
 	}
 }