Move mania tests to correct namespace
And some timing adjustments
# Conflicts: # osu.Game/osu.Game.csproj
# Conflicts: # osu-framework
Trim end of line
Fix ArgumentOutOfRangeException when parsing http://osu.ppy.sh/osu/1004136
Initial implementation of editor screens
Hopefully we can keep this at a ScreenSelectionTabControl level, but it may need to be moved to the Editor at some point. I'm leaving that for a future change however, if it's needed.