over over a parent item in the menubar only if another submenu is already open.
        That is, if all submenus are closed, a click on a parent menu item is required to display a submenu.
        Minimizing automatic popups makes exploring with a screen magnifier easier.
      </li>
      <li>
        In general, moving focus in response to mouse hover is avoided in accessible widgets; it causes unexpected context changes for keyboard users.
        However, like desktop menubars, there are two conditions 