Fix Advanced Play Single Track problem (#3141)
Fix Advanced Play Single Track problem (#3141)

* Fix Advanced Play Single Track problem

Fixed bug for advanced setting PLAY_SINGLE_TRACK not working with scheduled playlists. Missing $this->backendPlaySingleTrack() added.

* Update StationPlaylist.php

Co-authored-by: Buster "Silver Eagle" Neece <1999e4893f732ba38b948dbe8d34ed48cd54f058@busterneece.com>
SlvrEagle23/AzuraCast,SlvrEagle23/AzuraCast,AzuraCast/AzuraCast,SlvrEagle23/AzuraCast,AzuraCast/AzuraCast,AzuraCast/AzuraCast,AzuraCast/AzuraCast,SlvrEagle23/AzuraCast,SlvrEagle23/AzuraCast