Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  db55298d77107baa4f1c90a331c27cd6eaa8acb7

Load thumbnails, use loading image in core

This makes the loading experience _way_ nicer, and hopefully faster.

Bug: 56266
Change-Id: Ided64b0e15af84d9fe65517db2adb291c174c4bf