Bug 35283: Add missing subfields h and x to field 583 for staff XSLT

Bug 35283: Add missing subfields h and x to field 583 for staff XSLT

This change adds the missing subfields h and x to field 583 for
the detail XSLT in the staff interface.

Test plan:
0. Apply the patch and koha-plack --reload kohadev
1. Go to http://localhost:8081/cgi-bin/koha/cataloguing/addbiblio.pl?biblionumber=29
2. Click on tab "5"
3. Scroll down to 583 and click on "ACTION NOTE" to expand subfields
4. Fill in using the following example:
   583	0#$adowngraded$c19910110$hJoe Smith$otitle$xfrom secret FRD to confidential NSI
5. Click "Save"
6. Note that the "Action note" now shows "Joe Smith" and "from secret
   FRD to confidentail NSI"

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit d74a89e2dabe355f05c4c45b6b39e581509e1c16)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit ba9a11341041bc6fed3fb8c0ef7bf1f54d51c954)
Signed-off-by: Pedro Amorim <pedro.amorim@ptfs-europe.com>