Bug 25627: Move OPAC problem reports from administration to tools

Bug 25627: Move OPAC problem reports from administration to tools

This patch moves the OPAC problem report management page from the
Administration section to the Tools section.

I think this makes sense because management of reports is an ongoing
task, not a configuration.

To test, apply the patch and enable the OPACReportProblem system
preference.

 - Go to Administration. There should be no link to OPAC problem
   reports.
   - Open an administration page which shows the Administration menu in
     the left-hand sidebar, e.g. Libraries. There should be no link to
     OPAC problem reports in the menu.
 - Go to Tools. There should be a link to OPAC problem reports in the
   "Addional tools" section.
   - Open the OPAC problem reports page and confirm that it works
     correctly.
   - The breadcrumbs menu should show "Tools > OPAC problem reports."
   - Confirm that the link in the sidebar menu works correctly.
 - If necessary, submit an OPAC problem report via the OPAC so that
   there is a pending report. Go to the staff interface home page and
   check that the "OPAC problem reports pending" link works correctly.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>