Fix issue with Schedule notify on Manage Assignments (creates deadlock when deleting a Display)
Fix issue with Schedule notify on Manage Assignments (creates deadlock when deleting a Display)

dasgarner/xibo-cms,xibosignage/xibo-cms,dasgarner/xibo-cms,dasgarner/xibo-cms,xibosignage/xibo-cms,dasgarner/xibo-cms,xibosignage/xibo-cms,xibosignage/xibo-cms,xibosignage/xibo-cms,dasgarner/xibo-cms,xibosignage/xibo-cms,dasgarner/xibo-cms