title: Set selected item on a DataGridViewComboboxColumn
body: <p>I have a datagridview  with a DataGridViewComboboxColumn column with 3 values:</p>
  
  <p>"Small", "Medium", "Large"</p>
  
  <p>I get back the users default which in this case is "Medium"</p>
  
  <p>I want to show a dropdown cell in the datagridview but default the value to "Medium".  i would do this in a regular combobox by doing selected index or just stting the Text property of a combo box.</p>