Colorize historic chat messages depending on diplomacy color

[elexis]

Currently chat messages are colorized in either the player or diplomacy color at the time the message was received.

Since the previously received chat messages are archived in the colorized version, they will show the wrong color if diplomacy color mode changed, or if the observer changed the viewed player. This can be very confusing and defeats the purpose of using colors in the chat (differentiating players or allies depending on the color).

Colorizing the chat messages depending on the current state would be self-consistent as well as consistent with the other places that use player/diplomacy colors.

[Imarok]

Move tickets to In-game UI as UI & Simulation got some sub components.