Now `TileMap`s make use of the `self_modulate` property.
There's still a bug: The Editor doesn't re-draw with the new color when you change the TileMaps `self_modulate`
in the inspector. You'll have to make it update manually (by placing a tile, changing the transform, etc..)
I'll open an issue for that after this is merged (If I don't fix it in the meantime ^^).