* A combobox control with support for autocomplete, remote-loading, paging and many other features.
* @cfg {Boolean} append (true|false) default false
* @cfg {Boolean} autoFocus (true|false) auto focus the first item, default true
* A combobox control with support for autocomplete, remote-loading, paging and many other features.
* @cfg {Boolean} append (true|false) default false
* @cfg {Boolean} autoFocus (true|false) auto focus the first item, default true