[news.eclipse.platform.swt] Replace composite in sashform

[jantb@xxxxxxxxxx (Jan Tore Bøe)]

I need to swap two composites, both with different children, in a 
sashform. The idea is to let the user push a button and then the contents 
of the sashform will be changed from the first composite to the sencond 
one and visa versa. I get only a grey composite after I using 
setVisible(false) in "protected Control createContents(Composite parent)" 
and then setting it visible again later.