Fixed and in the repository. Tests included.

Cheers,
   - Andreas

Bert Freudenberg wrote:
> When I create a PluggableButton with an #enabled: selector, then it  is 
> only disabled after issuing a #changed: notification for that  selector. 
> IMHO it should be disabled when displaying the interface.
> 
> - Bert -
> 
> 
>