Revert "Fix worldrange jukebox not stopping playback when disc is removed"

This reverts commit 521ba3e149d6b2d7aff23b7bd57743f0a9e922cb.
Recommit "Fix worldrange jukebox not stopping playback when disc is removed"
Missing import
Sort server filelist by alphabetical
Merge pull request #126 from spathizilla/master

Cleanup the worldrange stop playback & sort alphabetically the server music list