Rework: LED, Playlist, Headphones

Hi,

I adapted the mapping for me and did some changes:

* deleted some mappings in the xml, that are not needed (Status 0x80 mappings)
* added the mapping for the LED
* removed the headphone mapping as it is to dangoures for my ears.
* reworked the playlist and track selection.
  If there is not track loaded in a deck, the Jogwheels are used to select a track.
  If the filemode is selected and got selected again, LoadSelectedIntoFirstStopped is called
  if foldermode get selected again, I would love to use ToggleSelectedSidebarItem, but afterwards the Foldermode wouldn't work.

Feel free, to use my changes.