Mailer: Include permission-required manager field.
Mailer: Fix permissions and crash errors.

* Load paper rows as PaperInfo objects, as required.
* Pass PaperInfo objects where required.
Remove unused.
Review display nit: Hide absent scores in display.
Fix PaperInfo when the user isn't logged in.

A not-logged-in user (e.g. author-view capability) has contactId 0.
Fix critical permissions error.

Only logged-in users can administer. This was an interaction between
paper managers/administrators and author-view capabilities. It may
have been introduced recently, with the rights rewrite. Reported
by Colin Dixon.