* recreate #13966
* gcast button works
* rewrote gcast-player to be GCastDestination and CastManager manages the interface between UI and casting destinations
* remove unneeded imports
* add "Connected to" translation
* Remove css for cast launcher
* fix tests
* fix doc tests
* fix the receiver application ID
* remove casting app ID
* remove cast button from nav bar
It is now present at the following locations:
- shared link album and single asset views
- asset viewer (normal user)
- album view (normal user)
* part 1 of fixes from @danieldietzler code review
* part 2 of code review changes from @danieldietzler and @jsram91
* cleanup documentation
* onVideoStarted missing callback
* add token expiry validation
* cleanup logic and logging
* small cleanup
* rename to ICastDestination
* cast button changes
86db0aafe5