Feature request: Fullscreen without resolution change, trouble with 4K display

[MaximilianC]

I have a 4K display and the default fullscreen resolution (3840 * 2860) in the "Full Screen Settings" does not work (it does not properly switch to fullscreen but everything around the FCEUX window turns black and the emulator shows a freeze frame).

I had to manually set the fullscreen resolution to some lower setting (e.g. 1024x768) for fullscreen to work. I am not sure why this is, but it might have to do with Windows also doing some other things when changing the resolution on a high resolution display (i.e. 4K), like changing the scaling.

But even then, it is slow to switch resolutions and it messes up my desktop because all windows larger than the selected fullscreen resolution are clamped, so I have to clean up my whole desktop after switching back from fullscreen.

Also, changing the resolution in fullscreen mode really is a relict from the long gone CRT age. It would be much nicer if fullscreen mode would simply create a borderless full screen window covering the whole desktop without messing with the desktop resolution.