Improve TrueType fonts scaling
Unfortunately, MyGUI does not support TrueType fonts properly - just it generates bitmap fonts on the fly. When we use GUI scaling, we increase generated bitmap fonts resolution, scale down to selected glyph height (the font size
setting) and then scale up with the whole GUI. It leads to quality loss.
Probably we can handle fonts on our size instead of MyGUI. AnyOldName3 suggests to use SDF:
If we make MyGUI/the shaders we make MyGUI draw text with understand SDF textures, and get Freetype to generate SDF textures (IIRC, they added that about a year ago), then we don't need the glyph resolution to precisely match the size they're shown on screen to get good results, so that gives us more leeway.