Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  a03f2905300d961b6d236bc19a15bb627a9f0fdf

Improve post-fullscreen panel/image sizing logic

Also deletes custom event that should have been cleaned up before

Change-Id: I531a9cb068b0ae26ea0c3b46d8fdad84068c6931
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/569