fix(glpiselectfield): restrict to items associatable to tickets

restriction on per item basis, like software

Signed-off-by: Thierry Bugier <tbugier@teclib.com>

inc/fields/dropdownfield.class.php

@@ -222,6 +222,12 @@ public function displayField($canEdit = true) {
                         ];
                         $groups = implode("', '", $groups);
                      }
+                     // Check if helpdesk availability is fine tunable on a per item basis
+                     if ($DB->fieldExists($itemtype::getTable(), 'is_helpdesk_visible')) {
+                        $dparams_cond_crit[] = [
+                           'is_helpdesk_visible' => '1',
+                        ];
+                     }
                   }
             }