Whether a popup (a menu, a picker, a panel) is showing that this component is not inside (reactive).
Returns boolean
Remarks
For transient UI that stands aside while the user is in a popup. Content of the popup itself reads
false, so a tooltip belonging to the menu still shows. A float with no popup (a toolbar) does not count.
Whether a popup (a menu, a picker, a panel) is showing that this component is not inside (reactive).