Second Unit Power Up Still Shows Queue from USB Device When USB not plugged In

[jgaud16]

First Time Powered Up - Queue was blank until USB Memory Stick was placed in top socket.
Removed USB Stick and Powered Down Unit.
Second Time Powered Up - Queue still showed previous MP3/MA4 songs without the USB Stick Installed.

[dermidgen]

Need to add some unmount actions to remove the source & update

Investigation needed:

• Update library on unmount (mpd update db)
• Trim queue of items that are no longer available
  • does mpd do this for us when it updates the db?
  • do we need to tell mpd to do this?
  • do we need to write a script to do this?