Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  b8b475c77cf6869bce72b8f0c8da314948f0af2a

Make preview link more prominent

Also cleaned up the SVG. I hate Illustrator so much for what it does to
SVGs.

Change-Id: I3c1b8b812ed50ad65a8c2f53835e440bfd2e77ac