Show / hide discussion styling issues

cc @annabeldunstone @iamphill

@jschatz1 Can you post the link to where you're seeing that?

@jschatz1 Oops nevermind I had the nav collapsed. I see it!

mentioned in merge request !3915 (merged)

Status changed to closed by commit 18e00e3b

mentioned in commit 18e00e3b

Mentioned in commit pfjason/gitlab-ce@18e00e3b