Added success message to drowl_paragraphs_container2layout.

modules/drowl_paragraphs_container2layout/src/Form/ConvertAllForm.php

@@ -88,6 +88,7 @@ class ConvertAllForm extends FormBase {
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $this->paragraphsConverter->convertAllFromAllEntities();
+    $this->messenger->addStatus('Container paragraphs have been converted. Check the results carefully and remove the unwanted fields from Layout Paragraph Type afterwards.');
   }
 
 }