[Kst] [Bug 116460] cleanup layout should be smart in regards tonumber of columns

[Brisset, Nicolas]

> I agree it is not a plot item.  But we don't have a window 
> dialog anywhere
> (yet) and I don't think it belongs on the toolbar.  so.... 
Let us wait and see what George has in mind. We can bring up the
discussion again later... or alternatively try to put it in the toolbar
and see what the users say (usability testing is sometimes the only way
to know). I personally don't see any problem with having it in the
toolbar, provided that it is updated when window focus changes. 

> The reason it is there is that you often want to consider how 
> many columns you want when you are creating plots.  so... ?
I think it is right to keep it here as well.