title: extjs combo:How to set user selected value as the default selected value next time?
body: <p>In extjs combo box, I have this requirement: When the user selects an option from the combo, capture it, and next time page is loaded and combo is init-ed, set the value(both value and displayvalue) to the user's last selection.
  I can get the user selected index by :<code>Combo.selectedIndex</code>, but how do we set this index back when the page loads next time?</p>
  
  <p>Or is there another solution?</p>