Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  4d82ffe80f1eba06efa92bf132411bccc380588f

Hygiene: Remove obsolete hidden class from common-js.less

It's now in common.less and cache is cleared now.

Change-Id: Id5290400002b760dfc8af0092c7e6026b0c02174