Updated mediawiki/extensions Project: mediawiki/extensions/DonationInterface 0f62da4d2b42fdeaa1ddf5b081bc9b84f84a4959

Add mustache loading overlay, show on form submit

Full-screen overlay should disable the buttons. No hide
functionality yet, but we don't need that for AstroPay 'cos
we're not doing ajax validation.

Bug: T107321
Change-Id: Ib31513119b48184c4aa4afbc7d6d80598429f0d7