* Bootstrap Column class
* @cfg {String} navId the navigation id (for use with navbars) - will be auto generated if it does not exist..
* @cfg {Boolean} carousel true to make the group behave like a carousel
* Bootstrap Column class
* @cfg {String} navId the navigation id (for use with navbars) - will be auto generated if it does not exist..
* @cfg {Boolean} carousel true to make the group behave like a carousel
* fetch a Navigation Group based on the navigation ID
* if one does not exist , it will get created.
* @param {string} the navgroup to add
* fetch a Navigation Group based on the navigation ID
* if one does not exist , it will get created.
* @param {string} the navgroup to add