Select NPC Portraits and AI Colors

[PyrrhicDefeat]

Given the limited number of NPC portraits, I'd like to be able to select/replace among the available choices if desired. I just sacked a governor and the best replacement was apparently a long lost twin, same face and voice. Not a huge issue but slightly confusing and lowering of immersion.

Similarly, I turn on regime colors to examine the map and me and everyone else is some minor variation of brown or green, which also blends in to terrain and logistics colors. I'd like to be able to assign colors to AI so I can clearly see who is who. If that's a problem please at least make the majors different primary colors, not shades of the landscape.