Create new optional observer buttons for sub factions

[xezon]

Create new optional observer buttons for sub factions. This way Control Bar Pro would become compatible with Patch104p.

[xezon]

Regarding faction alpha textures:
GeneralCamo:

You'll find them in the game files, as a TGA file under the GC_ naming convention
Just a note that the beta logo for the Superweapon general is also present. You'll want to use gc_absuper2.tga rather than gc_absuper.tga