Decorationless managed windows again

[Ove Kaaven]

On 21 Jan 2002, Alexandre Julliard wrote:

> Ove Kaaven <ovehk at ping.uio.no> writes:
> 
> > These won't be managed. Notice that my patch only manages popup windows if
> > they are children of the desktop, which I assume neither menus nor
> > tooltips are.
> 
> Of course they are. They cannot be children of another window or they
> would get clipped to the window rectangle.

This is incorrect, but I guess my code was also. For example, dialog boxes
are popup windows parented by their owner. They are not clipped to their
parent, but dialogs should probably also be managed. Hmm...