Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  4543f0650b1396d0deb2c59e3c5fab45b718651b
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Moved data type selector ui code into own class to facilitate testing and reuse and make special newproperty simpler

Change-Id: I3cfd438b34f2a7a2bcfa22a25b7f45c63485bd75