Updated mediawiki/extensions
Project: mediawiki/extensions/UniversalLanguageSelector  8defd1f4a8455d4c4d14d6be65e5d52f0ebe87dc

TypeError: window.navigator.userLanguage is undefined

This can happen, when the user deletes the pref User languages from the
browser.

Change-Id: Ieaf783fbae113724704e2cce2e166e56935e8ce1