Request: Changable resolution for Fullscreen

[GamerzHell9137]

Normally if you select e.g. 1x PSP internal resolution, fullscreen should run fine on pretty much any desktop GPU.

Auto selects the internal resolution based on the window size. Don't use that.

-[Unknown]

I know, but i don't want to sacrifice sharpness cause of that.
1280x720 looks better when its on native 1280x720 resolution than when its stretched on 1920x1080.