Bug 31773: Add page-section class to Manage staged MARC records page

Bug 31773: Add page-section class to Manage staged MARC records page

To test:
1. Apply patch
2. Have some MARC records and stage them for import. It will be nessesary to add more than 1
3. Go to the Manage staged MARC records page and make sure the table looks right with the page-section added.

Note: I am also adding the Bootstrap table class to this table becuase I think it makes the table look much nicer.

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