Note that this is different to the related tickets, which deal with linking a cue sheet to a full release. This deals with one file spanning two (or more) tracks in an album.

Particularly on cassette/vinyl releases the back of a release will specify multiple tracks, but those tracks bleed into each other. In these cases it is up to the ripper whether to split the tracks, and it may not be appropriate to adjust the MB database to fit the resulting rip/files. This leaves files that can't be tagged.

Edit: Another common case is a rip simply being 'Side A' and 'Side B'

I suggest a new option where you can select a matched track and then set it to '+1' (or more). This tells Picard:

1. To append the following track names (up to the number set) with a ' / ' join phrase
2. Stretch goal: add a tag that tells Picard to load the file in like this when it's added again
3. Perhaps a new addition (like a '+') on the matched icon to indicate that this is the situation

Things that are out of scope for this ticket/strawmen:

1. Trying to get scan or lookup to guess when it's a split track (this is an edge case and users should set it themselves)
2. Adjusting all the track numbers in the release (just use the number of the first track in the sequence/the matched track)
3. Anything else more complex than the three goals listed above

Mockup that contains all of the goals in a nice little image parcel: