title: how to change rowid
body: <p>I add new rows with id "new". After I save the row with a new value in the column designated as id (say "code") it remains with id "new" unless I reload the grid or delete the row &amp; add it again with the new id.</p>
  
  <p>Is there another function to change the rowid after the row is saved ?</p>
  
  <p>Thanks.</p>