services: provide deploy buttons

fixes #13315

application/controllers/ServiceController.php

@@ -210,6 +210,9 @@ class ServiceController extends ObjectController
                 parent::loadObject();
             }
         }
+        $this->view->undeployedChanges = $this->countUndeployedChanges();
+        $this->view->totalUndeployedChanges = $this->db()
+            ->countActivitiesSinceLastDeployedConfig();
 
         return $this->object;
     }

application/views/scripts/host/services.phtml

@@ -3,6 +3,7 @@
 <h1><?= $this->escape($this->title) ?></h1>
 <span class="action-links">
 <?= $this->addLink ?>
+<?= $this->render('object/deploymentLink.phtml') ?>
 </span>
 </div>