Add an admin page for bodies with missing email

[garethrees]

Extracted a specific item from #6423.

We currently show 178 > Find missing FOI email for these public authorities (try phoning!), but the list is limited to 20 bodies.

What do do

We should add something like /admin/bodies/without_request_email that renders a paginated list of bodies without a request_email.

We already have a model scope (PublicBody.without_request_email) so this is just a case of creating the controller and view. We should be able to generalise/reuse most of the view from the normal authorities list.

Getting there

Doesn't feel like this warrants a main admin nav item.

This can be linked from the bottom of the summary list

And from the btn-toolbar on the main bodies list.

[RichardTaylor]

Also I'd get rid of the "(try phoning!)" ... that's certainly not part of the process at WhatDoTheyKnow.com - we try to keep records in writing of everything we do, and why - it's surprising how often that comes in useful.

[garethrees]

On reflection I'd demote this in favour of #3477.

[garethrees]

On reflection I'd demote this in favour of #3477.

Looking at this again today, maybe not. This is likely to be significantly easier to implement and would at least give us a better workflow for handling this ourselves with more structured volunteering tasks.

[garethrees]

This now exists via /admin/tags/missing_email #7250