Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  30f8b68fee453cb8d3d4567cfab476cf53352f9e

Remove a workaround for position: fixed button bars

We don't have button bars at the bottom of the screen anymore and this
rule makes it harder to style some of the OOUI/VE elements.

Change-Id: I7bf7d0f8d8b7228c3272da0154cdc231696b3aa3