Fix visible region after loading list box items
Fix visible region after loading list box items

Make sure the visible region is updated after loading items, e.g. when
the users switches from the full todo list to the "uncompleted items
only" view.

Signed-off-by: Lukas Fleischer <c9ca73f8336dcfb037ec2c2abf52d80a6847a5cd@calcurse.org>

lfos/calcurse,lfos/calcurse,lfos/calcurse