gnome_db_control_widget

[Vivien Malerba <malerba linuxave net>]

Hi!

I've modified a bit the work you made on the GnomeDbControlWidget. Tell me if
you think the functions I added are the right thing to do. I've also modified
the gnome-db controls browser as well to use the new lib.

If you think it is OK, then on monday I will finish to modify the Postgres
controls (properties,...) and then you can make a new release, no?

Cheers,

Vivien