Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  7e90c0c661fc6c608abc66919c32a52d64fab850

Make error messages more vague

I got a "your post was not saved" error message when the infinite scrolling failed
on me; left me puzzled for a couple of moments: "What post? Saved?"

Change-Id: I19d747413253c11f2da2dbfa22e34510f34261b1