_onKeyupGlobal(e) {
        if (AutoNumericHelper.character(e) === AutoNumericEnum.keyName.Alt) {
            const hoveredElement = AutoNumericHelper.getHoveredElement();
            if (AutoNumeric.isManagedByAutoNumeric(hoveredElement)) {
                const anElement = AutoNumeric.getAutoNumericElement(hoveredElement);
                if (anElement.formulaMode || !anElement.settings.unformatOnHover) {
                    return;
                }

                this.constructor._reformatAltHovered(anElement);
            }
        }
    }
Listen for the `alt` key keyup event globally, and if the event is caught, reformat the AutoNumeric element that is hovered by the mouse.

@param {KeyboardEvent} e
@private