Remove unused double and there is no reason to load the raw emails.

Extract setup into before action hook. This will be reused in a new list
by tag action.

Remove routes for "all" and "recent" views.

The "recent" view already is redirected in the main `list` action to the
"all" view.

The "all" view should really be the default for the `list` action as
currently the `/list` endpoint will show no requests because there is no
view is selected.

Having access to the results here will allow us to check for the number
of results before rendering.

Allow users to view requests by tag. In the tag belongs to a category
then, load the category and render a different title.

Render any category notes and it's rich text body.