Bug 32587: Add page-section to 'items with no checkouts' report

Bug 32587: Add page-section to 'items with no checkouts' report

This adds page sections to the summary and result tables
for the 'items with no checkouts' report.

To test:
* Run the 'item with no checkouts' report with different settings
* Confirm result tables are missing the white brackground from
  page-section
* Apply patch
* Confirm the result tables now do have the white background

Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
  → Confirm both problem and solution
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>