Internal Resolution ≠ Window Resolution (MUGEN Port)

[Ksylatarsh]

Is your feature request related to a problem? Please describe.

I mostly have problems just sticking with one resolution for both because I want my games to use arcade resolution to prevent stuff like mixels and phantom pixels, in MUGEN this is possible by having Width/Height and GameWidth/GameHeight separated.

Describe the solution you'd like

Port MUGEN's Width and Height system (GameWidth/GameHeight).

Additional context

Probably keep screenshots too on internal resolution if possible?

Search terms

width height gamewidth gameheight resolution

[K4thos]

added in #2185