Merge branch 'master' into jgrpp

# Conflicts:
#	src/3rdparty/fmt/core.h
#	src/command_type.h
#	src/console_cmds.cpp
#	src/core/overflowsafe_type.hpp
#	src/landscape.cpp
#	src/network/network.cpp
#	src/newgrf_object.h
#	src/object_cmd.cpp
#	src/order_gui.cpp
#	src/saveload/vehicle_sl.cpp
#	src/script/api/script_industrytype.cpp
#	src/script/api/script_object.hpp
#	src/script/api/script_town.cpp
#	src/table/object_land.h
#	src/timetable_cmd.cpp
#	src/tree_cmd.cpp
#	src/vehicle_gui.cpp
#	src/window.cpp

src/3rdparty/squirrel/squirrel/sqclass.h

@@ -10,6 +10,7 @@ struct SQClassMember {
 		val = o.val;
 		attrs = o.attrs;
 	}
+	SQClassMember& operator=(SQClassMember &o) = delete;
 	SQObjectPtr val;
 	SQObjectPtr attrs;
 };