Support Year → Artist → Album Advanced Grouping and Descending Sort Order

[wennaspeedy]

Currently, I can create a grouping hierarchy like:

Level 1: Year - Album
Level 2: Artist

However, I cannot create a grouping hierarchy in the following order:

Level 1: Year - Artist - Album

This would be useful for users with compilation albums, soundtracks, or large music collections where browsing by year and artist before album is preferred.

It should be possible to create a grouping hierarchy such as:

Year, Artist, Album

Additionally, it would be useful to allow ascending and descending sorting for grouping levels independently.