track-level add-to-playlist/favorite should follow player

[Gunnar Holmberg]

With the new navigation and actions it becomes *very* important that when playing a track, then next track, then next... the back button follows the played-track. Currently it does not follow the player, and consequently you will get back to where you first entered.

Steps to reproduce:
1) play a track, and then next, then next.
2) press back button to access the actions (add-to-playlist, favorite)

Current results:
It goes back to the track you started with, and just clicking favorite would favorite the first track - not the one you just listened to.

Expected results:
The contextual actions and the "back" follows the player, such that you can favorite the track you just listened to.