Unit / building icons lack player color after the latest update

[puzzlepaint]

After the latest update to the original game, unit / building icons are provided in a way that allows to fill in the player color for the corresponding image parts, rather than always being blue. The game needs to adapt to this to render the icons correctly.

I also noticed that there are new texture atlas files, for example for the in-game UI panels. But the old files still seem to exist as well, so this did not get broken yet ...

[puzzlepaint]

I might look into this issue today.