Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  189897994aa9d4e9f1fab2abbfbb46cd908ec31c

Hygiene: Cleanup gallery css

* Kill dead/unncessary css
** A lot of these rules are provided by #content_wrapper .thumb and
ul tags
Change-Id: Iee44632292b89dd2f131d529740e8e6f3306cbda