Updated mediawiki/extensions
Project: mediawiki/extensions/GuidedTour  e577391135d591a3bcad80a71005020125c9da71

Remove unused button CSS (inherited from GuidersJS)

Add TODO about distinguishing buttons in the future, when
mw-ui-progressive is in core.

Bug: 56142
Change-Id: I07c51ed417e89be397e1b17c5b5fea42ca0c2892