searchbox is renamed to filterbox

git-svn-id: file:///var/www/svn/anahita/todos/branches/search@17035 a933e228-e664-4d3f-8241-49479697c698
- added a response object for the controller. it mimics the features of the controller response object in the nooku 13.2 (closing the gap)
- returning string from action no longer render the content, the response content must be set explicity

git-svn-id: file:///var/www/svn/anahita/todos/branches/search@17050 a933e228-e664-4d3f-8241-49479697c698