Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  14a6a28307c20042fff13eb4bb86f725c5a84c53

Fix ClaimDifferenceVisualizer test that fails for non-English wikis

Also includes some cleanup and allow language code to be injected
into ClaimDifferenceVisualizer

Change-Id: Ie18168a4ac76230aeafca7f026f32dfb456142c4