core (xmlui): added method to convert data form result to XMLUI:

- former method was misnamed as it was used to convert data form element to XMLUI, so it has been renamed to dataFormEltResult2XMLUI
    - dataFormResult2XMLUI is now use to convert wokkel.data_form.Form instances to XMLUI

src/plugins/plugin_xep_0050.py

@@ -324,7 +324,7 @@ class XEP_0050(object):
                                   )
 
         if session_id is None:
-            return xml_tools.dataFormResult2XMLUI(data_elt)
+            return xml_tools.dataFormEltResult2XMLUI(data_elt)
         form = data_form.Form.fromElement(data_elt)
         # we add any present note to the instructions
         form.instructions.extend(self._mergeNotes(notes))