Player cannot be opened if track in playlist is deleted

[robbevp]

• There are no similar issues reported yet
  Slightly related to Playlist is affected when track is merged #230

Describe the bug
If a track inside the playlist is deleted, the Player can no longer be opened to reveal the playlist.
(Since we automatically skip tracks without audio or tracks that no longer exist, the audio will keep playing without problem)

To Reproduce
Steps to reproduce the behavior:

1. Add album to playlist
2. Delete track from album
3. Click on playlist toggle in player
4. Nothing happens

Expected behavior
The playlist should be visible without the deleted track