title: ExtJS Fieldset Collapse issue
body: <p>I have designed Fieldset and checkboxtoggled set to true,My requirement is click on check box(uncheck) of fieldset, Hide some controls in fieldset, again check on checkbox show all controls (need not to collapse fieldset when click on checkbox).</p>
  
  <p>What is the right way to handle this?</p>
  
  <p>(I am using collapse/expand listeners for fieldset, but unable to achieve it)</p>