Marinus Schraal authored Mar 29, 2019 and Marinus Schraal committed Apr 01, 2019

A Grl.Media can be a container or a specific media item. In the latter case
if there was no album title tag, the fallback would be the filename. This
would result in two columns potentially having the same value in Songs
view.
Instead return "Unknown album" if the tag is not available.