- Only show multi-disc icon, and prompt for disc to use, etc., if LMS is set to group multi-disc albums.
- Add add and play actions to subtoolbar for 'All songs' listings.
- Don't show disc headers in 'All songs' listings.
- Hide settings password.
- Update gallery image when track changes if this is showing now playing cover.
- Only show 'Play disc starting at track' if there are multiple discs.