Bug 34389: Fix inconsistencies in debit types titles, breadcrumbs, and header

Bug 34389: Fix inconsistencies in debit types titles, breadcrumbs, and header

This patch fixes a couple of inconsistencies in the debit types
administration page, making sure the page title, breadcrumb
navigation, and page headers are consistent with each other.

To test, apply the patch and go to Administration -> Debit types. Test
each variation of the page:

- Main page
- New debit type
- Modify debit type

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>