Add class helpers to different action types
Style fact check emails

Pull out fact check emails so they’re displayed differently. This
should make it easier to scroll past them when they’re very long, make
them easier to find in the list and reduce the space they take up by
reducing their font size.
Split apart fact check replies and original emails

* Only show the latest response in the history and notes feed to
prevent pages of scrolling
* Keep the full original email available behind a toggle, so it can be
viewed if necessary and so that no information is unavailable
* Works for common reply formats from outlook, OSX mail, iPhone and
Blackberry
* Ignores everything but the first instance of an original email
Tweak link copy

Refer to earlier messages rather than original message. There may be
more messages in the reply chain, some of which might have worthwhile
content.
Refer to the original email parser repo

(Rather than the fork)
Move email action setup to specific test
Merge pull request #308 from alphagov/style-fact-check-emails

Hide earlier emails in a fact check received email chain