Updated mediawiki/extensions
Project: mediawiki/extensions/UniversalLanguageSelector  771c6cff6a13426fd9cd108dc7a00d83a0d85b72

Update jquery.uls from upstream

* Localization added for Belarusian
* Code cleanup in jquery.uls.core.js
* Call proper cancel function on pressing the cancel button
* Remove the unused option menu

Change-Id: I4482c6c63d93bdbc520bf3d505288b4b88c66eab