Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  cfb9f19d60df12703fcd4dd5c94e8b987de30001

Story 1096: Beta section editing tutorial a/b test

Make ContentOverlay not a full screen overlay so that it can be placed
anywhere in the page. Consulted with designers.

Note: Edit button in page actions menu doesn't trigger the A/B test.

Change-Id: Ief06fa2bbafa709bc7ae0eec40de8f8eff01757a