3D Resolution Scaling Update

I've made a tiny update for MKCR which adds a 3D Quality slider to the game. The 3D Quality slider controls how pixelated the game looks. The slider doesn't affect the UI quality, just the 3D quality if you want to for a more pixelated-look. 

This update isn't available for the Compatibility version of MKCR as of right now since the 3D quality scaling only works properly on the Forward+ and Mobile renderer options in Godot.