Revert "monitoring: Remove the services tab when showing an object's history"

This reverts commit b3e0851b62.

modules/monitoring/application/controllers/ShowController.php

@@ -214,6 +214,19 @@ class Monitoring_ShowController 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',