Merged requested to merge 1201-va-track-artist-used-instead-album-artist into stable
Closes #1201 (closed), #1806 (closed), #1846 (closed)
Basically, in case of being filled, the metadata field
artists was chosen over
album artist for album serialization. If that field had multiple artists the first one was chosen as main album artist. That obviously broke the labeling of various artists albums.