Fix object.zIndex is not a function error
Fix object.zIndex is not a function error

zIndex is not actually a function in newer versions of jQuery UI
https://jqueryui.com/upgrade-guide/1.12/#removed-zindex
dasgarner/xibo-cms,PeterMis/xibo-cms,xibosignage/xibo-cms,xibosignage/xibo-cms,guruevi/xibo-cms,alexharrington/xibo-cms,alexharrington/xibo-cms,PeterMis/xibo-cms,dasgarner/xibo-cms,guruevi/xibo-cms,PeterMis/xibo-cms,dasgarner/xibo-cms,xibosignage/xibo-cms,alexharrington/xibo-cms,alexharrington/xibo-cms,xibosignage/xibo-cms,xibosignage/xibo-cms,dasgarner/xibo-cms,alexharrington/xibo-cms,guruevi/xibo-cms,dasgarner/xibo-cms,PeterMis/xibo-cms,xibosignage/xibo-cms,dasgarner/xibo-cms,PeterMis/xibo-cms