Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  a9c0322c6c26a8b48e29aa0ab04edf0488448bcf

Add preview function

Maryana said no-js support is of low priority, that will be implemented
in another patch later

Change-Id: Ia98006ba7c8d961d78e89de45d93a72513b21970