erp5_web_renderjs_ui_test: stabilize python action

bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_page_templates_zuite/testFormPythonFailingAction.zpt

@@ -29,12 +29,17 @@
 </tal:block>
 <tal:block metal:use-macro="here/Zuite_CommonTemplateForRenderjsUi/macros/wait_for_content_loaded" />
 
+<tr>
+  <td>waitForElementPresent</td>
+  <td>//div[@data-gadget-url='${base_url}/web_site_module/renderjs_runner/gadget_erp5_pt_form_python_action.html']</td>
+  <td></td>
+</tr>
+<tal:block metal:use-macro="here/Zuite_CommonTemplateForRenderjsUi/macros/wait_for_content_loaded" />
 
 <tal:block tal:define="notification_configuration python: {'class': 'error',
                                                            'text': 'Missing expected foo_url parameter'}">
   <tal:block metal:use-macro="here/Zuite_CommonTemplateForRenderjsUi/macros/wait_for_notification" />
 </tal:block>
-<tal:block metal:use-macro="here/Zuite_CommonTemplateForRenderjsUi/macros/wait_for_content_loaded" />
 
 <tr>
   <td>assertElementPresent</td>