Enforce a slightly brighter minimum lightness for lobby nicks.
WIP nick tab completion. Currently bound to Alt-C since Tab does not work correctly yet. Known problems:
- Not bound to tab.
- Since there is no method to get the caret position, replaces anything that's the start of a nick with the nick.
- Since there is no method to set the caret position, the caret does not end up at the correct location after the completion.
Merge branch 'lobby' of https://github.com/JoshuaJB/0ad into lobby