Based on whether a chat is
- DM
- Room
- Public room
allow to select whether to color usernames
- Uniformly (as previously done in SC themes)
- Based on Matrix ID (as previously seen in Element themes)
- Based on the user's power level in that room (new!)
The setting concerning rooms that are neither DM nor public is also used
for deciding whether to use mxid-based avatar coloring or uniform
coloring.
Change-Id: Ic68a24f4818a193f776a3b14232f887cd229929a
24a61ee0ff