The email pattern looked a bit shonky when displayed in a narrower column. This
commit fixes it by making the email’s metadata (eg subject, from) into a table,
which it sort of is. This means that it is more flexible about the size of
container in which it sits.
This commit parameterises all methods in the send view so that they can send
either emails or SMS messages.
It works out what kind of message it is sending from the `template_type`
property of the template object.
This means that the `Template` util class needs to know about these properties,
which means that this commit depends on:
https://github.com/alphagov/notifications-utils/pull/2
This commit does _not_ add tests for sending emails. The existing tests for
sending SMS still pass, but actually sending emails is outside the scope of
this story.
Templates now have:
- a type (email or sms)
- a subject (if they are email templates)
We don’t want two completely separate view files for email and SMS, because they
would have an enormous amount of repetition.
So this commit adds
- different templates for SMS and email templates
- different form objects for SMS and email templates
…and wires them up.
