Allow configuring the zone for notification templates

refs #594

application/forms/IcingaNotificationForm.php

@@ -21,7 +21,7 @@ class IcingaNotificationForm extends DirectorObjectForm
             'required'    => true,
             'description' => $this->translate('Icinga object name for this notification')
         ));
- 
+
         $this->addDisabledElement()
              ->addImportsElement()
              ->addUsersElement()
@@ -33,10 +33,31 @@ class IcingaNotificationForm extends DirectorObjectForm
              ->addDisabledElement()
              ->addCommandElements()
              ->addEventFilterElements()
+             ->addZoneElements()
              ->groupMainProperties()
              ->setButtons();
     }
 
+    protected function addZoneElements()
+    {
+        if (! $this->isTemplate()) {
+            return $this;
+        }
+
+        $this->addZoneElement();
+        $this->addDisplayGroup(array('zone_id'), 'clustering', array(
+            'decorators' => array(
+                'FormElements',
+                array('HtmlTag', array('tag' => 'dl')),
+                'Fieldset',
+            ),
+            'order' => 80,
+            'legend' => $this->translate('Zone settings')
+        ));
+
+        return $this;
+    }
+
     /**
      * @return self
      */