IsImportant
init
virtual
UserAvatarNotification
ProgressNotification
Notification.Closed
Close
FillFlow.Spacing
Also adds test coverage of read state and light.
NotificationContent
MainContent
and tidy things up a bit.
To help with test failures and the likes.
# Conflicts: # osu.Game.Rulesets.Osu/UI/Cursor/OsuCursorContainer.cs