[Seaside] Updaters clicks and changes on (sub)components

[Sebastian Sastre]

> Two possible solutions:
> 
> 1. backtracking of the children (don't know if this works as 
> expected with AJAX)
> 
I've tried by implementing #states returning all the children but it didn't
work.

> 2. #children is supposed to return all children that you 
> *might* display. You can also return more (e.g. the old and 
> the new one)
> 
Oh yeah this one did it ! Thanks a lot!!

Cheers,
Sebastian
PS: some care I'm having to take to prevent the second action interfere with
the first but that's another story.

> Cheers,
> Lukas
> 
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
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