monitoring/security: Hide 'Remove Problem Acknowledgement' action if user lacks the respective permission

modules/monitoring/application/views/scripts/show/components/acknowledgement.phtml

@@ -22,7 +22,13 @@ if ($object->getType() === $object::TYPE_HOST) {
 if ($object->acknowledged): ?>
     <tr>
         <th><?= $this->translate('Acknowledged') ?></th>
-        <td><?= $removeAckForm ?></td>
+        <td>
+            <?php if (isset($removeAckForm)) { // Form is unset if the current user lacks the respective permission
+                echo $removeAckForm;
+            } else {
+                echo '&#45;';
+            } ?>
+        </td>
     </tr>
 <?php else: ?>
     <tr>

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

@@ -67,11 +67,13 @@ abstract class MonitoredObjectController extends Controller
         }
         if ( ! in_array((int) $this->object->state, array(0, 99))) {
             if ((bool) $this->object->acknowledged) {
-                $removeAckForm = new RemoveAcknowledgementCommandForm();
+                if ($auth->hasPermission('monitoring/command/remove-acknowledgement')) {
-                $removeAckForm
+                    $removeAckForm = new RemoveAcknowledgementCommandForm();
-                    ->setObjects($this->object)
+                    $removeAckForm
-                    ->handleRequest();
+                        ->setObjects($this->object)
-                $this->view->removeAckForm = $removeAckForm;
+                        ->handleRequest();
+                    $this->view->removeAckForm = $removeAckForm;
+                }
             } else {
                 $ackForm = new AcknowledgeProblemCommandForm();
                 $ackForm