Fix sending notification emails fixes xibosignage/xibo#2644
Fix sending notification emails
fixes xibosignage/xibo#2644

(cherry picked from commit 68e7d5e29fd2575760764cf4208d1b5dcfca9737)

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