Finally! After 2 days: Display fixes on Linux (Ubuntu)

Finally! I’ve got the game working at a good resolution on windows, mac AND linux. I discovered that linux (at least Ubuntu 20.04.2) does not handle letterboxing well (when you have black bars to fix the resolution of apps in Fullscreen):

macOS and windows do this well out-of-the-box. I was surprised! For a moment, for a few seconds, I was actually sad because I expected a linux operating system to handle display customization better. If you want to set a fixed whole number orthographic camera size- this sort of thing is important for ‘pixel perfect’ and sharp and crispy pixel art.