title: How to refresh an extjs window (Ext.Window) on its button click
body: <p>I have an Extjs window which has two buttons 'Save and Refresh' and 'Clear' Buttons.</p>
  
  <p>Now I need to refresh the window on button click of the 'Save and Refresh' button.</p>
  
  <p>could you please explain me how to do this?</p>
  
  <p>Thanking You,</p>
  
  <p>Regards,
  Sathya</p>