Task : truncate lastRunMessage to 255 characters xibosignage/xibo#2702
Task : truncate lastRunMessage to 255 characters
xibosignage/xibo#2702

(cherry picked from commit 18cc3e05337e09d62e57218d3df4a2b15836f478)

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