Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  c3827140b7e8b75d19033ffd72178c70e0e21237

(bug 53678) make change handler compatible with site link badges

this also includes general improvements to site link comment
code in client, splitting code out from change handler, and more tests

Change-Id: I51c293aa46b6f6ced10487cfaf8d80960056c6de