Instead of displaying collections as media types, show their library names. This is how they’re divided in the media details page anyway, and improves the feature for anyone with multiple libraries per media type.
In my setup, for example, I have 4 movie libraries: Movies, Shorts, Documentaries, Stand-Up Comedy. With this improvement, the current display below media details would go from this:
Cast
Extras
_____ Collection
Movies in _____ Collection
Movies in _____ Collection
Movies in _____ Collection
TV Shows in _____ Collection
…to this:
Cast
Extras
_____ Collection
Documentaries in _____ Collection
Shorts in _____ Collection
Stand-Up Comedy in _____ Collection
TV Shows in _____ Collection
Another option would be to simply organize this section of the page by media type, so it would merge collections and list all from one media type in each row. However, I think this would eliminate the usefulness of the current layout:
Cast
Extras
Movies in _____ Collection
TV Shows in _____ Collection
Music in _____ Collection
Photos in _____ Collection
Other Videos in _____ Collection
