erp5_trade_renderjs_ui_test: Tic after deleting documents.

Especially important as the deleted document has an hard-coded ID which gets reused - as is the case here.

It may not be a good idea to hardcode such ids in tests too, but I cannot judge at a glance.

/cc @romain

/reviewed-on !1020

bt5/erp5_trade_renderjs_ui_test/SkinTemplateItem/portal_skins/erp5_trade_renderjs_ui_test/Zuite_CommonTemplateForTradeRenderjsUi.zpt

@@ -29,6 +29,7 @@
       <td>Deleted Successfully.</td>
       <td></td>
     </tr>
+    <tal:block metal:use-macro="here/Zuite_CommonTemplate/macros/wait_for_activities" />
     <tr>
       <td colspan="3"><p></p></td>
     </tr>