Code in Music Overlay to set music skin properties do not get updated if the playlist changes.

This is only an issue where the next track is updated (a change to the current track would fire a g_Player media changed event which is handled.

h4. Steps to Reproduce
Start playback of track A.
Check in now playing screen that next track details are blank
Add track B to the current playlist
Check again in now playing screen and next track details are still blank