there's a hidden feature I don't like at all. if you double click on the "white area" just inside the border, it goes into a " maximized" state where title bar

there's a hidden feature I don't like at all. if you double click on the "white area" just inside the border, it goes into a " maximized" state where title bar and menus will disappear. it's so easy to enter this mode by mistake and no obvious way to get back