Merge branch '16.0-stephane-date-vide' into 16.0-stephane

templates/operation_templates_page.xml

@@ -74,9 +74,7 @@
                                             </a>
                                         </td>
                                         <td t-att-data-order="c.date_app">
-                                            <t
-                                                t-out="c.date_app.strftime('%d/%m/%Y')"
-                                            />
+                                            <t t-out="c.date_app.strftime('%d/%m/%Y') if c.date_app else ''" />
                                         </td>
                                         <td>
                                             <t t-out="c.name" />