erp5_web_renderjs_ui_test: stabilize jump

bt5/erp5_web_renderjs_ui_test/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui_test/Zuite_CommonTemplateForRenderjsUiJump.zpt

@@ -61,6 +61,11 @@
       <td>//div[@data-gadget-url='${base_url}/web_site_module/renderjs_runner/gadget_erp5_pt_form_jump.html']</td>
       <td></td>
     </tr>
+    <tr>
+      <td>waitForElementNotPresent</td>
+      <td>//div[@data-gadget-scope='header']//h1//*[contains(@class, "ui-icon-spinner")]</td>
+      <td></td>
+    </tr>
     <!-- Another loader for loading the final page -->
     <tal:block metal:use-macro="here/Zuite_CommonTemplateForRenderjsUi/macros/wait_for_content_loaded" />