Changes

Further testing is needed, but on multi-monitor setups on Windows using the GL driver, it appears RetroArch will only sync smoothly when outputting to the Windows-designated primary monitor. Outputting to a secondary monitor will often result in occasional stutter, even in exclusive fullscreen and after accurate refresh rate estimation, [[https://mollyrocket.com/casey/blog_0032.html possibly due to a WGL oversight]]. Short of switching primary and secondary designations prior to opening RetroArch, increasing audio latency or using only audio sync seems to help mitigate this to an extent. Switching to either the D3D or Vulkan (if available) driver appears to eliminate this problem completely.