Favourite Songs empty state looks broken

This is what the favourites list looks like when no tracks have been starred:

The big empty space makes the feature appear ambiguous. The line at the top also looks out of place.

We should use an empty placeholder here, to fill the void and point users in the right direction. The text to use could be something like "Starred Tracks Will Appear Here" or "Star Tracks to Add Them Here". Mockups for this would be helpful.