title: show the detail of a row in celltable
body: <p>the requirement is easy, but I don't know how to do it.
  there is a celltable with a column of radio button (or check box but only allow select one row), after user select that row, there is a button and user can click that button to see the detail of that row.</p>
  
  <p>How to do it?</p>
  
  <p>I try to SingleSelectionModel, but I assume the user origin select row 3 radiobutton, then the row3 underlying field is set to true, then when user select the row 5 radiobutton, the row 5 corresponding field is set to true, but I have no method to set the previously row 3 selected field to false.</p>