* @cfg {Boolean} append (true|false) default false
* @cfg {Boolean} autoFocus (true|false) auto focus the first item, default true
* @cfg {Boolean} tickable ComboBox with tickable selections (true|false), default false
* @cfg {Boolean} append (true|false) default false
* @cfg {Boolean} autoFocus (true|false) auto focus the first item, default true
* @cfg {Boolean} tickable ComboBox with tickable selections (true|false), default false