Don't try and shown pagination if no pager present

Prevents 'Argument "" isn't numeric' warning on admin report edit page.
Version 1.5.2.

* Suppress 'Argument "" isn't numeric' warning in admin report edit page.
* [UK] Don't show topic form field when reporting abuse.
* Use token in moderation response URL to prevent hidden report leak.
* Make sure successful submission page is full width.