Closes #1552.
This is important when using dynamic compiling to rapidly iterate. Until we actually split projects out into pieces (like the abstract ruleset project we have talked about) there is no advantage to using internal in the osu! game code.
# Conflicts: # osu-framework
They were blocking each others' input unnecessarily.
Implements IHasAccentColour for conformity to rest of project. Also fixes a nullref when opening the login menu.