Revert "monitoring: Remove the services tab when showing host or service details"

This reverts commit 646cffd62d615e6a4d716440a9f5728c19b87120.

modules/monitoring/library/Monitoring/Web/Controller/MonitoredObjectController.php

@@ -181,6 +181,19 @@ abstract class MonitoredObjectController extends Controller
                 )
             );
         }
+        $tabs->add(
+            'services',
+            array(
+                'title'     => sprintf(
+                    $this->translate('List all services on host %s'),
+                    $isService ? $object->getHost()->getName() : $object->getName()
+                ),
+                'label'     => $this->translate('Services'),
+                'icon'      => 'services',
+                'url'       => 'monitoring/show/services',
+                'urlParams' => $params
+            )
+        );
         if ($this->backend->hasQuery('eventHistory')) {
             $tabs->add(
                 'history',