[self-interest] Fix morphs

[Thorsten Dittmar]

Hi Randy,

thanks a lot. That was the right hint. Just for the other who wants to try
out this: There is just one mistake in the code
> 
> Here is some code:
> 
>  | world. stickyMorph. edge. myHand |
>  
>  world: (desktop named: 'Self 1').

world: (desktop worldNamed: 'Self 1').

Will work fine. Thanks again to Randy