Fixed rendering of operations container for event message lists.

Author: dpi

src/Form/MessageListForm.php

@@ -107,6 +107,7 @@ public function buildForm(array $form, FormStateInterface $form_state, EntityInt
     // Actions.
     $form['actions'] = [
       '#type' => 'details',
+      '#title' => $this->t('Operations'),
       '#attributes' => [
         'class' => ['container-inline'],
       ],