I'd like to see this similar to the way genres are shown in the header of the artist detail view.
Simply collect all genres from the tracks on the fly and list them sorted by count.
1. track: rock, pop
2. track: rock, punk
3. track: rock, metal
4. track: pop, synth-pop
--> rock, pop, punk, metal, synth-pop
Thank you guys for implementing this so quick!