Completely refactor the detail module. This is for a few reasons:
- Prevent data regeneration every time a fragment re-creates.
- Make DetailModel follow the customs of other ViewModels.
- Simplify layouts into a single detail item to reduce code
complexity.
Currently sorting doesn't work, but that is still being worked out
as the legacy SortMode continues to be phased out of Auxio.
Re-add sorting to HomeFragment, except heavily improved. The major
improvement here is the addition of song sorting, which was a heavily
requested feature judging by #16. The setting does not save yet and
is not present in the detail fragments, but it is still a major
milestone for the new home ui.
