Bug 34386: Fix inconsistencies in Cities and tows page titles, breadcrumbs, and header

Bug 34386: Fix inconsistencies in Cities and tows page titles, breadcrumbs, and header

This patch updates the cities administration page so that page title,
breadcrumb navigation, and headings are consistent with each other and
with other parts of Koha.

To test, apply the patch and go to Administration -> Cities and towns.
Check each variation of the page to confirm that page title, breadcrumb
navigation, and heading are correct.

- Main page (listing cities)
- New city
- Edit city
- Delete city

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