erp5_workflow:WorkflowTool_convertWorkflow, workflow reassignment in a single function.

bt5/erp5_workflow/SkinTemplateItem/portal_skins/erp5_workflow/WorkflowTool_convertWorkflow.xml

@@ -87,6 +87,7 @@ for workflow in selected_workflow_list:\n
 \n
   # conversion and reassignment\n
   new_workflow = context.dc_workflow_asERP5Object(context, workflow, temp=0)\n
+  context.reassignWorkflow(workflow.id)\n
   selected_workflow_id_list.append(workflow.id)\n
 \n
 if batch_mode:\n