Set default value of a RelationField as the default value of a TextField.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@10319 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/RelationField.py

@@ -55,6 +55,7 @@ class RelationStringFieldWidget(
        MultiRelationField.MultiRelationStringFieldWidget.local_property_names
 
   default_widget_rendering_instance = Widget.TextWidgetInstance
+  default = Widget.TextWidget.default
 
   def _generateRenderValueList(self, field, key, value, REQUEST):
 #     value = value or NO_VALUE