Add change requests to the 'Things to do' list
Reorganise specs

In order to make it clearer where to add new specs, group specs by
controller and action, merging specs relating to internationalisation
with other specs as there seem to be no specific prerequisites in terms
of set up for them, and removing some duplicate specs.
Allow from_admin_message to take a name and email.

Previously it accepted a user, but for this usage we won't necessarily
have one.
Populate admin public body forms based on a change request.

Also add editable text for an email to be sent to the person requesting
the change.
Make link style consistent with others.
Add form for closing change request without action

For cases where we don't want to make the change suggested. There
doesn't seem to be any obvious default text to use in the response to
the person who requested the change.
Add admin urls to change request emails