Bug 36877: Fix Patron card creator errors on editing layout, profile or template

Bug 36877: Fix Patron card creator errors on editing layout, profile or template

This patch fixes the unexpected behaviour when clicking on edit layout,
edit profile or edit template in Patron card creator tool.

Test plans:

1.  edit layout:

  a) go to http://localhost:8081/cgi-bin/koha/patroncards/manage.pl?card_element=layout
  b) click on edit 'Test Layout'
  c) WARNING: An unsupported operation was attempted on layout 20.
     Please have your system administrator check the error log for
     details.

apply patch
  a) go to http://localhost:8081/cgi-bin/koha/patroncards/manage.pl?card_element=layout
  b) click on edit 'Test Layout'
  c) Edit patron card layout form 20 shows up

2. edit template and profile:

  a) go to http://localhost:8081/cgi-bin/koha/patroncards/manage.pl?card_element=template or
     http://localhost:8081/cgi-bin/koha/patroncards/manage.pl?card_element=profile
  b) click edit on an item in the table
  c) notice that the forms are empty

apply patch and redo steps a) and b) to load the edit form

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>