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/network/network_gui.cpp

@@ -2531,6 +2531,6 @@ void ShowNetworkAskRelay(const std::string &server_connection_string, const std:
 {
 	DeleteWindowByClass(WC_NETWORK_ASK_RELAY);
 
-	Window *parent = FindWindowById(WC_MAIN_WINDOW, 0);
+	Window *parent = GetMainWindow();
 	new NetworkAskRelayWindow(&_network_ask_relay_desc, parent, server_connection_string, relay_connection_string, token);
 }