Disable Vsync while holding tab to disable the frame limit, and allow toggling vsync while emulation is running in OGL.

D3D9 still doesn't support changing vsync while emulation is running.

Fixes issue 6111.

Source/Plugins/Plugin_VideoDX11/Src/D3DBase.cpp

@@ -520,7 +520,7 @@ void EndFrame()
 void Present()
 {
 	// TODO: Is 1 the correct value for vsyncing?
-	swapchain->Present((UINT)g_ActiveConfig.bVSync, 0);
+	swapchain->Present((UINT)g_ActiveConfig.IsVSync(), 0);
 }
 
 }  // namespace D3D