Tracks removed from library cause issues in play queue

[robbevp]

There are some issues when tracks are in the play queue and then get removed from the local library

Reproduction steps

1. Sync data with api
2. Queue up album
3. Remove same album from api
4. Sync again
5. See "empty" tracks in play queue

If you have previously played a track, the player is still able to play it (but not to correctly show the info)

In the below screenshot I'm playing a track for which the info doesn't exist anymore. Below that are some additional tracks which don't exist anymore.

Expected behaviour

I'd expect tracks to be removed from the play queue when they get removed from the library

System information

V0.11.0

[robbevp]

I'm apparently unable to add screenshots in the github app. I'll post it later