Updated mediawiki/extensions
Project: mediawiki/extensions/MediaWikiChat  5d30b67c1e6f52c8bb95dd73ad13f9d822518736

Add fullscreen mode

Using $out->disable(). Adds preference for whether to use chat in
fullscreen.

Change-Id: I45bc10105d8dfcdcefaa175095bc90b0969b2b50