listbox is also a special keyword in forms, this allows

this kind of link : listbox_reference -> my_reference

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@30576 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/Form.py

@@ -759,7 +759,8 @@ class ERP5Form(ZMIForm, ZopePageTemplate):
     def getProxyableFieldList(self, field, form_field_list=None):
         """"""
         def extract_keyword(name):
-            return [i for i in name.split('_') if not i in ('my', 'default')]
+            return [i for i in name.split('_') if not i in \
+                    ('my', 'default', 'listbox')]
 
         def check_keyword_list(name, keyword_list):
             count = 0