Updated mediawiki/extensions
Project: mediawiki/extensions/UploadWizard  1763c42c1e90a84287d9e01a4e4297f3afa370af

Store Title as backing identifier for UploadWizardCampaign

Previously used WikiPage, which wasn't really what we wanted.
Plus, titles are easier to get hold of

Change-Id: I7b6a98fa2e7596ac400d947c819b61a97242a51e