3293558: Mark comparison form as workspace safe

Closes #3293558

src/Form/RevisionOverviewForm.php

@@ -306,6 +306,7 @@ class RevisionOverviewForm extends FormBase {
       '#type' => 'pager',
     );
     $build['#attached']['library'][] = 'node/drupal.node.admin';
+    $form_state->set('workspace_safe', TRUE);
     return $build;
   }