Move PauseOverlay to correct namespace.
Fix BeatmapDeleteDialog namespace
"Security" update for OsuPasswordTextBox.
Remove usages of negative Margin / Padding
Fix selection on entry to song select.
Replaces such usage with more sensible settings, like changing the position or size.
When file is in use, we expect it to presist removal, in other words, fail to delete.
Also only shows sets with beatmaps for current play mode.