Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  4d4203f8f68ffbe4fc5eff505912c7e14bf8ac67

QA: tie moderation message to first topic

by way of a nested element

The moderation test fails incorrectly if some message other than the
first topic is moderated.

Change-Id: I885ffec6cdaf7f6cffc55f3e342bc085b02f6a09