Fixed crash related to removing tracks from the library that are currently in the play queue.
Fixed crash related to removing tracks from the library that are
currently in the play queue.

clangen/musikcube,clangen/musikcube,onnerby/musikcube,clangen/musikcube,onnerby/musikcube,clangen/musikcube,clangen/musikcube,onnerby/musikcube,onnerby/musikcube,clangen/musikcube,clangen/musikcube,onnerby/musikcube,clangen/musikcube