Bug 32072: Consistent classes for primary buttons: Cataloging

Bug 32072: Consistent classes for primary buttons: Cataloging

This patch makes changes the button markup in Cataloging templates
so that all submit buttons and any buttons that should should be styled
as primary buttons have the Bootstrap class "btn btn-primary."

To test, apply the patch and view pages in Cataloging to confirm
that everything looks correct. In most cases there are no visible
changes.

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