FEATURE - Swap top and bottom screen in menu

[HotPizzaYT]

I'd absolutely love it if there was an option in the menu to swap top and bottom screen. You swap back with select. This would be useful for people with broken top screens that wish to still use their 3DS.

I do not have any clue on how 3DS homebrew works, but I do know that the code that renders the frames are in /pc/gfx/gfx.c, so you could modify that code to switch top and bottom screens. Thank you.