Bug Fixes in Multimedia
Fix completely bogus MediaDeviceHandler::removeMediaDeviceTrackFromColl
That method did not work _at all_ because it used wrong key in the
trackMap forgot to actually write back other maps. :-)
As a result, dead tracks were never removed from memory collection and
thus the count was not updated, among other (worse) things.
DIGEST: Capacity gauge is now always updated for iPods & MTP devices