Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  2aa12e4e6be48ce41d53ec88412b4719cf4c53d9

Distinguish "formatted" from "unformatted" post revisions, and do
not bother storing HTML for unformatted post revisions.

Used currently for topic title posts.

Change-Id: If45b5a35b49a6d2087e0e2eaf479549418b63c64