[#911227] Make draggable tooltips more obvious.
Bug 916236 - Sketchfab plugin improvements

[t916236] fix minor usability issues with sketchfab plugin; reenable it's ability to be seen
[t916236] custom sketchfab for a blurb about Sketchfab.com
[t916236] sketchfab background fix & URL error
[t916236] editor helper fixes