Merge branch 'master' into jgrpp

# Conflicts:
#	src/airport_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/build_vehicle_gui.cpp
#	src/company_gui.cpp
#	src/crashlog.cpp
#	src/dropdown.cpp
#	src/dropdown_type.h
#	src/genworld_gui.cpp
#	src/gfx.cpp
#	src/main_gui.cpp
#	src/newgrf_debug_gui.cpp
#	src/news_gui.cpp
#	src/news_type.h
#	src/openttd.cpp
#	src/order_gui.cpp
#	src/settings.cpp
#	src/settings_gui.cpp
#	src/signs.cpp
#	src/smallmap_gui.cpp
#	src/spritecache.cpp
#	src/spriteloader/grf.cpp
#	src/texteff.cpp
#	src/toolbar_gui.cpp
#	src/town_cmd.cpp
#	src/vehicle.cpp
#	src/vehicle_gui.cpp
#	src/video/opengl.cpp
#	src/viewport.cpp
#	src/waypoint_cmd.cpp
#	src/zoom_type.h

src/zoning_gui.cpp

@@ -94,7 +94,7 @@ struct ZoningWindow : public Window {
 		for (const ZoningModeInfo &info : _zone_modes) {
 			if (info.debug && !IsDebugEnabled()) continue;
 			SetDParamStr(0, info.param);
-			list.push_back(std::make_unique<DropDownListStringItem>(info.str, info.mode, false));
+			list.push_back(MakeDropDownListStringItem(info.str, info.mode, false));
 		}
 		ShowDropDownList(this, std::move(list), current, widget);
 	}