Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  cdbaba7a0492d0e43d9f16792e34161fcf258f1c
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(hot fix) follow-up to l4afd88c8 which broke some selenium tests

In case of adding a new claim, an error was thrown. This solves the issue.

Change-Id: I32b17ece8f6fc8013dcda01f46d1f616e72153d3