tools (xml_tools): added "read_only" argument in dataFormResult2XMLUI (and use it in plugin pubsub_schema)

sat/plugins/plugin_exp_pubsub_schema.py

@@ -311,6 +311,7 @@ class PubsubSchema(object):
                         ("text", item_elt.getAttribute("publisher", ""), u"publisher"),
                     ),
                     filters=filters,
+                    read_only=False,
                 )
                 items_xmlui.append(xmlui)
                 break