Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  9bf8aeb4e17dd4fa14e86ff0bf92e306ab27ded2

Refactor SpecialMergeItems

Rewrite of SpecialMergeItems based on ItemMergeInteractor.

Change-Id: I7d7402c874d7fc306f3da14fe21f53c656b9f063