This version allows you to change projectors using up and down arguments, without having to open up the select menu. The projectors are switched immediately if the select menu is not opened.
Additionally, the space on the right for the scroll arrows to appear if the menu is very long has been removed, meaning that the entire display is now centred. The menu will not look as good if you have more projectors than will fit into the select menu as a result, but people seem to want the heading to be centred more than they want the scroll arrows to behave. If you don't have many projectors in your group, you won't see the scroll arrows anyway.