Change the colors of icons that have had differing colors at certain sizes, to make them all consistent.
This MR will change:
- folder-important at size 48 & 96 to a red color (and add some presumably missing fill-rule attributes to 96),
- folder-paint at size 22 to same as text color,
- Godot mimetypes (except gdscript) at sizes 32 & 64 to their respective colors,
- RData mimetype at size 16 to the color used at all other sizes.