Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  58af234cba4aba93a4161952d5fd9d1ee1e53c7a

ReAdd validation for wbsetreference....

The call to the method was accidently removed,
this re adds it as well as doing general cleanup

Bug: 56623
Bug: 56662
Change-Id: I8b8f8930fc47a530165fc51caaf52ccb9efa1495