Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  666f2b3af370dfd4dbeea58ba20e8db8ce27b402

Make the behavior of the lightbox more consistent with scroll

Makes sure that the advanced description is out of view when
the lightbox opens.
Remembers the scrollTop position that was set when the lightbox
opens, in order to restore it when it closes.

Change-Id: I534f7d718528d1e5a4911c68a524eb96cadeae90