Bug 32159: Fix heading hierarchy on uncertain prices page

Bug 32159: Fix heading hierarchy on uncertain prices page

This makes sure we don't have 2 level 1 headings on the same page.

To test:
* Create a new order for a basket in the acq module,
  make sure the uncertain price checkbox is checked bevor saving
* Go to uncertain prices using the link in the toolbar on the
  basket summary page
* Verify that there are 2 almost identical h1 headings and a "/ Fax:"
  reference at the top of the page
* Apply patch
* Verify that we now have one level 1 heading and a level 2 heading
  for each section. The fax reference is also gone.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>