Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  28562a280483c16df7aa16683773c305a8208b2e

(bug 43997) adding Selenium tests for linking items on client

patchset 3: making tests for editing sitelinks from client non-exp.
patchset 4: rebased

Change-Id: I057aeab9d0c7096465d3f9ee93008aade78cbe0a