[Zurich] Add full size image link to report admin

This will allow the image to be opened full size in a fancybox, just
like the front end of the site currently does.
[Zurich] Add fancybox js/css to report_edit page
Better make_css, doesn't die if grep too long.
Replaced hardcoded Mapit-URL in error message to use variable from config instead
Changed hardcoded URL in Problem.pm to be using variable from general.yml instead.
The string 'Get updates' wasn't localized
A missing i18n string.
Updated MapQuest links per instructions
Update test to match text change in June.

Silly me.
Merge branch 'zurich-admin-image-zoom'
[Zurich] Show thumbnails on admin summary pages

Closes mysociety/FixMyStreet-Commercial#406
Make 'Permalink' JS string translatable.
Version 1.2.3.
[Zurich] Only super user can edit bodies
[Zurich] Only link to edit body for super user
[Zurich] Add test for superuser body editing
[Zurich] Test for only superusers can add bodies
[Zurich] Only superusers can see add body form
[Zurich] Use get_ok for superuser adding bodies test
Fix comment in tests