title: DataGridView Cell Validating only when 'Enter' is pressed
body: <p>I want to validate and commit the value entered in the DataGridViewCell <strong>ONLY</strong> when the user presses the 'Enter' key.</p>
  
  <p>If the users presses any other key or mouse button (Arrow keys, Pressing a different cell using the mouse...), I want the behavior to be similar to the 'ESC' key: Move the focus to the new cell and revert the edited cell value to its previous value.</p>