[Seaside] Overlay dialogs?

[Lukas Renggli]

> 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 ;-)

Cheers,
Lukas

-- 
Lukas Renggli
http://www.lukas-renggli.ch