Merge branch 'master' into jgrpp-beta

# Conflicts:
#	src/command.cpp
#	src/console_cmds.cpp
#	src/group_gui.cpp
#	src/lang/catalan.txt
#	src/lang/czech.txt
#	src/lang/danish.txt
#	src/lang/greek.txt
#	src/lang/hungarian.txt
#	src/lang/irish.txt
#	src/lang/japanese.txt
#	src/lang/luxembourgish.txt
#	src/lang/norwegian_bokmal.txt
#	src/lang/romanian.txt
#	src/lang/russian.txt
#	src/lang/serbian.txt
#	src/lang/simplified_chinese.txt
#	src/lang/slovak.txt
#	src/lang/spanish_MX.txt
#	src/lang/swedish.txt
#	src/lang/tamil.txt
#	src/lang/traditional_chinese.txt
#	src/lang/turkish.txt
#	src/lang/ukrainian.txt
#	src/lang/vietnamese.txt
#	src/network/network.cpp
#	src/network/network_client.cpp
#	src/network/network_func.h
#	src/network/network_internal.h
#	src/network/network_server.cpp
#	src/network/network_server.h
#	src/saveload/afterload.cpp
#	src/saveload/newgrf_sl.cpp
#	src/saveload/saveload.h
#	src/script/script_instance.cpp
#	src/toolbar_gui.cpp
#	src/toolbar_gui.h
#	src/vehicle_gui.cpp
#	src/widgets/rail_widget.h
#	src/widgets/vehicle_widget.h
#	src/window.cpp

src/video/video_driver.hpp

@@ -325,6 +325,8 @@ protected:
 
 	std::chrono::steady_clock::duration GetDrawInterval()
 	{
+		/* If vsync, draw interval is decided by the display driver */
+		if (_video_vsync && _video_hw_accel) return std::chrono::microseconds(0);
 		return std::chrono::microseconds(1000000 / _settings_client.gui.refresh_rate);
 	}