Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  169df626c9dc5a9d5f6e70cfab5dc0a9407c1f38

Make the ReferenceView have a ListView, instead of being one

ReferenceView was the only widget which inherited from ListView, instead of
having an instance of ListView.

Switching to the latter makes the codebase more uniform. Also, it's
conceptually more correct since the reference view actually consists of more
than just a list -- it also has a heading (and a toolbar).

This change is a prerequisite for the patch addressing bug 62527.

Change-Id: Id51603ae20c83175cdda78a5f2fa51eca887c367