Add ability to sort by genre when browsing by Record Label

As per subject, when browsing by label it’d be very handy to be able to browse by genre.

That would mean albums that are associated with multiple genre would be listed multiple times i.e. once in each genre section.

An interesting request, I’m try to visualise my lib ordered that way, I don’t think I’d like to scroll thought it.

bump, browsing by label is pretty ineffective without it… Bill Evans and Budgie hardly belong in the same company.