Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  0cd0cc8b0547951500e341392ff2f6ecabc41090
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Checking on initial snak when drawing property

Check prevents property input element from being converted to a text node when an error happens
while adding a completely new claim.

Change-Id: I9d640c6f81f97a30ae98f48c65419e6cc4fb9080