Make all TestCases public in line with framework TestBrowser changes
Added Deselect All button to ModSelectOverlay
Make completion notification text for ProgressNotifications customisable
Fix profile header not correctly being masked
Closes #1592.
Implement Editor hitobject selections
Implement keyboard controls in gameplay overlays (pause/fail)
Since this is not the intended functionality.
Rewrite BeatmapCarousel with ModelView implementation