title: UISearchbar clearButton forces the keyboard to appear
body: <p>I have a UISearchBar which acts as a live filter for a table view.  When the keyboard is dismissed via endEditing:, the query text and the gray circular "clear" button remain. From here, if I tap the gray "clear" button the keyboard reappears as the text is cleared.</p>
  
  <p>How do I prevent this?  If the keyboard is not currently open I want that button to clear the text without reopening the keyboard.</p>
  
  <p>There is a protocol method that gets called when I tap the clear button. But sending the UISearchBar a resignFirstResponder message doesn't have any effect on the keyboard.</p>