title: How to reload data rows in GXT grid?
body: <p>Assuming that data retrieves from DataStore using RPCproxy, populate to grid using ListStore upon opening the page. </p>
  
  <p>Then, there's a form to add an entity and after modification it will reflect the new list in GXT grid with the new added row.</p>
  
  <p>How can reload the grid? I tried .reconfigure() method in Grid but didn't work. </p>