tools, frontends, memory: param definition and XMLUI handle multi-selection for list widgets:

- we need to update urwid_satext to revision 79
                          - no more "value" attribute value in the "list" element, use
                            HTML-style "select" attribute in the "option" elements instead
                          - /!\ param saving do not handle multiple values yet!

src/plugins/plugin_xep_0249.py

@@ -59,7 +59,7 @@ class XEP_0249(object):
     <params>
     <individual>
     <category name="%(category_name)s" label="%(category_label)s">
-        <param name="%(param_name)s" label="%(param_label)s" value="%(param_default)s" type="list" security="0">
+        <param name="%(param_name)s" label="%(param_label)s" type="list" security="0">
             %(param_options)s
         </param>
      </category>
@@ -70,8 +70,9 @@ class XEP_0249(object):
         'category_label': _("Misc"),
         'param_name': AUTOJOIN_NAME,
         'param_label': _("Auto-join MUC on invitation"),
-        'param_default': AUTOJOIN_VALUES[0],
-        'param_options': ['<option value="%s"/>' % value for value in AUTOJOIN_VALUES]
+        'param_options': '\n'.join(['<option value="%s" %s/>' % \
+                                   (value, 'selected="true"' if value == AUTOJOIN_VALUES[0] else '') \
+                                   for value in AUTOJOIN_VALUES])
     }
 
     def __init__(self, host):