Remove 'back to top' option
Merge pull request #836 from Projjol/master

Fixes Bug 1019586 - Remove 'back to top' on Tools page
 Bug 1027273 - Add embedded videos to Privacy resources page Proof of Concept
Adds youtube and vimeo content types
removes yt from middleware, sce takes care of that
comment your code, aki.
balances videos out, adds image content type
adds test content
pass linting