Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  815c92c60fe260c6db90bb1d7a537aca9e37745d

Implemented claimgrouplistview widget

Split off claimgrouplistview widget from claimlistview. The claimgrouplistview widget manages
claimlistviews. This resembles the UI structure of references and qualifiers.

Change-Id: Ic9281c0c80ba6c769d9dc5192f621504db3b6f56