setup size prefs

[Reini Urban]

I'm just implementing better setup resizability, in particular 
remembering previous window states (size + pos) as requested.
And the bugfix to resize smaller than the default size from the ressource.

Which window sizes do we want to store?
I started with one size for all, then I rewrote for one size for each 
propertypage, and now I believe the best would be to store/restore only 
two sizes.
The big size for the package list and the small for the rest.

What else do we want to remember?
The state of the two checkboxes at the end? What else?
-- 
Reini Urban
http://xarch.tu-graz.ac.at/home/rurban/