Initialize the display_style_list value to prevent a validation error.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35539 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_ui_test/SkinTemplateItem/portal_skins/erp5_ui_test/ListBox_setPropertyList.xml

@@ -93,6 +93,7 @@ d = dict(\n
   field_domain_root_list = \'\',\n
   field_report_tree = \'\',\n
   field_report_root_list = \'\',\n
+  field_display_style_list = \'\',\n
   field_list_action = \'list\',\n
   field_enabled = \'checked\',\n
   field_editable = \'\',\n

bt5/erp5_ui_test/bt/revision

-569
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+570
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