IcingaEndpointForm: use new helpers

application/forms/IcingaEndpointForm.php

@@ -48,15 +48,7 @@ class IcingaEndpointForm extends DirectorObjectForm
             'description' => $this->translate('The log duration time.')
         ));
 
-        $this->addElement('select', 'zone_id', array(
-            'label'       => $this->translate('Cluster Zone'),
-            'description' => $this->translate('Check this host in this specific Icinga cluster zone'),
-            'required'    => true
-        ));
-
-        $this->addElement('text', 'imports', array(
-            'label' => $this->translate('Imports'),
-            'description' => $this->translate('The inherited endpoint template names')
-        ));
+        $this->addZoneElement()
+            ->addImportsElement();
     }
 }