[#33509] Very smal fix for yes/no buttons  

Please see here: #33509
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=33509&start=0
Update config.xml
Merge pull request #3360 from zero-24/patch-9

[#33509] Very smal fix for yes/no buttons