function activateMenuItemsByValue(menu, value) {
				if (menu instanceof Menu) {
					menu.items().each(function(ctrl) {
						if (!ctrl.hasMenus()) {
							ctrl.active(ctrl.value() === value);
						}
					});
				}
			}
Getter/setter function for the control value.

@method value
@param {String} [value] Value to be set.
@return {Boolean/tinymce.ui.ListBox} Value or self if it's a set operation.