This patch adds the "empty" parameter to the PROCESS directive which
builds the "Class" dropdown. This allows the user to choose a blank
option when creating or editing a patron attribute.
To test, apply the patch and go to Administration -> Patron attribute
types -> Add patron attribute type.
In the entry form the "Class" dropdown should have a blank option. When
editing an existing attribute with a class defined, the correct class
should still be preselected.
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
