Issue #3036461 by Aron Novak, maliknaik, alexpott: States details element uses...

Issue #3036461 by Aron Novak, maliknaik, alexpott: States details element uses unsupported '#collapsible' attribute

core/modules/workflows/src/Form/WorkflowEditForm.php

@@ -83,7 +83,6 @@ public function form(array $form, FormStateInterface $form_state) {
       '#type' => 'details',
       '#title' => $this->t('States'),
       '#open' => TRUE,
-      '#collapsible' => 'FALSE',
     ];
     $form['states_container']['states'] = [
       '#type' => 'table',