Translate datetime object with icu: split date and time

Translate datetime within icu format

src/Bundle/ChillMainBundle/Controller/WorkflowController.php

@@ -387,6 +387,7 @@ class WorkflowController extends AbstractController
                 'notice',
                 $this->translator->trans('workflow.signature_zone.already_signed_alert')
             );
+
             return $this->redirectToRoute('chill_main_workflow_show', ['id' => $signature->getStep()->getEntityWorkflow()->getId()]);
         }