title: Change the visible position of ROWs of ultragrid programmatically
body: <p>I have an ultragrid with an unbound Boolean column that i had named it "Select".</p>
  
  <p>user can select and deselect a row by checked or unchecked the "Select" cell of that row.</p>
  
  <p>but if the number of the grid rows are very much, its difficult for the user to find all of selected rows.</p>
  
  <p>So i want to send the selected rows to the top of the grid just after the user select them.
  but i could not found any property that can help me?</p>