Bug 32197: Add page-section to catalog's stock rotation page

Bug 32197: Add page-section to catalog's stock rotation page

This page wraps the content of the stock rotation page in the catalog
with a "page-section" div.

Note: This patch includes indentation changes, so use diff accordingly.

To test you  must have the StockRotation system preference enabled.
Apply the patch and locate a bibliographic record in the catalog.

- Click the "Rota" link in the sidebar.
- Confirm that the table of items on this page is surrounded by a
  container with a white-background.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>