Bug 32633: Add 'page-section' to cataloging and authority pages

Bug 32633: Add 'page-section' to cataloging and authority pages

This patch adds a "page-section" container div around the main section
of cataloging and authority pages which lack it.

This patch contains indentation changes, so please ignore whitespace
when looking at the diff.

Apply the patch and view the following pages to confirm that the main
content is contained in a white box:

 - Cataloging -> Cataloging search results
 - Cataloging -> Edit items: The table of items and the item edit form
   should each be contained in a page-section.
 - Authorities -> Search results
 - Authorites -> Merge authorities: From the authorities search results
   list, click "Actions -> Merge" for one result, and then "Actions ->
   Merge" for another.
 - Click "Next" after selecting a merge reference.
   - The "Destination record" information should be contained in a
     page-section.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>