Bug 33136: Added class "page-section" to the result page table of serial record search

Bug 33136: Added class "page-section" to the result page table of serial record search

Added class "page-section" to the result page table of serial record search to fit into the new staff design.

To test:
- Go to serials
- Create a new subscription
- Click o nzthe "Search for Record" link
- Search for something (example: e)
- Verify the result table
- Apply the patch
- Repeat the steps
- The result table should have the correct background

Signed-off-by: Jan Kissig <bibliothek@th-wildau.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 532d4d0ac646970f3740f9f4867aded2d70ccef3)
Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>