/**
  * Method configureShell.
  *
  * @param shell Shell
  * @see org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets.Shell)
  */
 @Override
 protected void configureShell(Shell shell) {
   super.configureShell(shell);
   shell.setText(ADD_PARTICIPANT_DIALOG_TITLE);
   shell.setMinimumSize(R4EUIConstants.DIALOG_DEFAULT_WIDTH, R4EUIConstants.DIALOG_DEFAULT_HEIGHT);
 }