Make Song only matcher more forgiving. When matching songs only based on acoustid matching we have an issue when acoustid matches to multiple tracks with different names because sometimes one acoustid can match to multiple completely different songs either because it really does or because incorrect data added to acoustid.
We already filter out minor differences so titles don't have to be identical but we are still preventing a match when the titles are sufficiently similar to there not be a problem, since we only want to prevent a match when linked to multiple completely different songs.
We need to make title checker a bit more forgiving, especially regarding typographic errors. Also appplies when song already has title and we need to work which acoustid title best matches (if any) the users song title.