Add support for MusicBrainz tracklist formatting

[lbr5539]

Currently a tracklist copied from MusicBrainz isn't formatted correctly
The track lenghts inside the parentheses aren't processed and get added to the track titles instead

MB uses the following format:

1. Title1 (1:00)
2. Title2 (2:00)
3. Title3 (3:00)