Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  946915963f23268dc1698e8c73d1634b8b907be7

Adjust collapser capabilities and allow its use on post elements

- flow-topic-collapsed/expanded is now flow-element-*
- Added styling for moderated posts (now grey text and author link)

Change-Id: Ib76489f5d90dede944a47ee90b708f459ed985a6