Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  3bb0a4c612ed5b6d0d95ddb8184d1bd28705b188

Hygiene: Remove unused .show class from #content_wrapper

Also, fix margins for the dynamic page loading spinner.

Change-Id: If14424b110f963040fc2b6c0833fcdad630ee41b