Refactor StyledImageView and ImageGroup into a new class called
CoverView.
This new view is more sensibly designed and should be capable of
handling non-square album covers when implemented.
Animate the check mark and background change when a item is selected.
This produces a nicer UX overall. If possible, I'm planning to also
port this to the other indicators in ImageGroup, albeit doing that is
signifigantly harder.
Redefine the meaning of activation across the app to align with the SDK
documentation.
According to the documentation:
- Activation -> A permanent kind of selection initiated by the user.
This means playback states, item selection, etc.
- Selection -> A transient kind of selection that can be added or
removed without user input. This includes things such as playing
indicators.
Redefine usages of selection and activation across the app to align
with this.
Add a dialog for picking a genre from several choices.
This basically completes multi-genre support in Auxio, save more
internal reworks.
Note that it is extremely likely that the "Play from genre" setting
will be removed soon. This feature has made me realize that such does
not many any real sense, as genres are more semantically similar to
playlists than artists or albums. This implementation only exists to
make multi-artist support an easy plug-and-play operation.
Resolves#201
