Improved file backend and delete empty directories if file got removed.
Improved file backend and delete empty directories if file got removed.

monotek/zammad,monotek/zammad,monotek/zammad,zammad/zammad,zammad/zammad,zammad/zammad,zammad/zammad,zammad/zammad,zammad/zammad,monotek/zammad,monotek/zammad,monotek/zammad