Updated mediawiki/extensions
Project: mediawiki/extensions/UploadWizard  4917f9cd60422bf0e2465db79c5082839825bf2b

Hide the 'Next' button until a license is chosen.

When uploading an image the 'Continue' button only appears after the
files have uploaded, it therefore makes sense to show the 'next' button in
the license step only after any deed is selected.

This removes the need for the NullDeed

Change-Id: Id9551311d833ace26abff4bec1ad136a84206168