Bulk edit (and move) tracks

What is the problem you are facing?

I have uploaded many tracks by accident, which missing some information e.g. Licence, Copyright, Tags etc. At the moment you can only edit the tracks one by one or you have to delete them all and then you have to prepare them with e.g. Picard and reupload them again. Both alternatives are a pain. It would be very helpful if there would be an option to bulk edit all selected files in the user and/or admin interface.

Optional, it would be very helpful if you could move (all selected) tracks between albums/libraries/playlists --> see also #984

What are the possible drawbacks or issues with the requested changes?

None.

Context