[Seaside] Overlay dialogs?

[Bany, Michel]

> > lr.100 through lr.106, nothing ported to VW in that branch
> 
> Well, I am trying to make everything a bit more plug-gable 
> and compose-able starting from lr.100. I also fixed some 
> problems with the inheritance hierarchy. Not everything from 
> lr.100 is fully working using the new features yet, but it is 
> quite useable. It comes from lr.70, pmm.71 didn't not work for me.
> 
> Our students handed in some AJAX exercises today using lr.106 
> and they didn't complain, so that is already a good sign ;-)
> 

There is now a VW port for this branch on the public store.
It requires the very latest Seaside version from the public store.

Lukas, I had to create mb.107 to fix a couple of minor glitches.

Enjoy,
Michel.