Bug 34395: Fix inconsistencies in Authority types page titles, breadcrumbs, and header

Bug 34395: Fix inconsistencies in Authority types page titles, breadcrumbs, and header

This patch fixes some inconsistencies in the authority
types administration page, making sure the page title, breadcrumb
navigation, and page headers are consistent with each other.

Test each page to confirm that page title, heading, and breadcrumbs are
consistent:

- Administration -> Authority types
  - New authority type
  - Edit authority type
  - Delete an authority type which is not used
  - Delete an authority type which is in use
  - Authority type MARC structure
    - New tag
    - Edit tag
    - Delete tag
    - View subfields
    - Edit subfields

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>