Game window does not maintain aspect ratio when resizing program window

[extherian]

This causes the game window to stretch as shown in this image:

By contrast, when Citra's program window is set to the same sized used by Alber.exe in this case, the game output aspect ratio is as follows:

Would it be possible to adjust the game output aspect ratio to scale correctly with window size?

[wheremyfoodat]

(Quoting from the Discord: A bit annoying to do rn, as it will likely require renderer adjustments in order to properly set up the display viewport)