Improvements to (progress) notifications
Fix cross-thread notification posting causing a hard crash
Make OsuButtons visually disable when not enabled
Use a transaction when adding a beatmap
Add the ability to create migrations on a per-store level
Fixes flakey unit test.
Fixes a potential threading issue when updating Text.
Posts can be triggered by Logger.Log events which are not guaranteed to be on the update thread.
Also adds an option to delete all beatmaps for testing purposes.
Now stores store versions to the database itself.
Allow ChatOverlay resize only if it dragged by tabs area only
Allow OsuColour.FromHex to support prefix #.
Coincides with https://github.com/ppy/osu-web/pull/1373
Tidy up database namespaces and classes
Add word wrap support to chat
Welcome back BeatmapManager
Fix a potential hard crash when exiting song select
Also exit the import process before importing files to the file store to avoid incorrect reference count increments.