* @cfg {Number} height fixed height - usefull for chrome extension only really.
* @cfg {String} size (sm|lg) default empty
* @cfg {Number} max_width set the max width of modal
* @cfg {Number} height fixed height - usefull for chrome extension only really.
* @cfg {String} size (sm|lg) default empty
* @cfg {Number} max_width set the max width of modal