Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  f4ab39df1e767fd05131b6a8f1df4c3b83719d14

Fix runaway prev/next issue

Prev/next handlers were multiplying after every click.

Change-Id: I1e21b2711cc08a6edbbd26ec844e966f7582b3c8