Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  e8d02191319edc1f8c1821fb8c7adfa68cb20e2d

Fix call on undefined in entityselector.js

The .label property is not necesarrily set. Calling .toLowerCase()
on undefined causes this to fail. The error is not horrible, as far
as I can see, so this does not need to be backported.

Change-Id: Ic47db34e6e94ce85949795a19655b371041862c2