Bug 30936: Reindent authority detail template

Bug 30936: Reindent authority detail template

This patch updates the authority detail template so that indentation is
consistent.

To test, apply the patch and go to Authorities.

- Locate an authority record and view the detail page.
- Everything should look correct, with working numbered tabs.
- If the AuthDisplayHierarchy preference is enabled, you should see a
  collapsible tree of elements in the authority hierarchy.

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>