Method runMenu

src/main/java/fieldbox/boxes/MarkingMenus.java:222–225

(Box origin, Vec2 center, MenuSpecification m)

	}

	static public Mouse.Dragger runMenu(Box origin, Vec2 center, MenuSpecification m)
	{
		return runMenu(origin, center, m, null);
	}
	static public Mouse.Dragger runMenu(Box origin, Vec2 center, MenuSpecification m, Runnable atEnd) {

		MarkingMenus menus = origin.first(markingMenus, origin.both())