* Show the now playing cover when playing an item, otherwise show the
collection cover.
* ItemModelLoaders now correctly expose list properties of non-built-in
Qt objects
* toString is now implemented for lists, fixing some query
construction code.
* PlaybackManager now clears the playlist when playing a single item to
prevent weird behaviour.
* The covers are slightly updated.
* Pressing shuffle will now show a notification indicating it is not
implemented.
* On the initial setup, the discovered settings are displayed somewhat
more neatly.
* Disable reloading the main view each time the MainPage gets activated.
- PlaybackManager now takes ownership of set items
- PlaybackManager can play items just by their itemId, avoids useless
item creation on the QML side of things.
- Allow calling Jellyfin::registerTypes with a different URI
- Minor code cleanup