Changes
- Added preferences for audio and subtitle tracks
- Added next/previous episode buttons to the player
- Added support for the BoxSet item type and BoxSet libraries
- Added fallback posters on the library page
- Added trickplay images in the player
- Added dedicated "nextUp" and "resume" home sections
- Added page and search params to the url on the library page to ensure better navigation
- Fixed an issue where the "continueWatching" home section would not contain all items to resume
- Fixed an issue where the porgress for an episode would sometimes show 0% even though it was already watched
- Some codebase cleanup