Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  4e752dd08d41e28a54c4ec34584d3ad4384e433f

Track optin/optout events

Change-Id: I07eeef7a2304df4b70be252929737dad84522afb
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/558