Matching heuristic: ignore artist name in track name

When the track title contains the artist name (like "ArtistName 1. TrackTitle"), the track index/number allocation of an album doesn't work correctly. It seems like the artist string disturbs the matching function. The rest of the track title and the track number matches the tracks of the found album.

Start by tracing the track-matching heuristic from the issue and reproduce it with a title such as "ArtistName 1. TrackTitle". Done means the artist prefix no longer disrupts album track-number allocation while the remaining title and number still match the found album.

Written by the indexing model from the issue text.