appeared in the window.

Sheri Steeves <sheri@macadamian.com>
In LISTBOX_UpdateScroll(), if the listbox did not have the WS_SCROLL
style it would just return.  This left the horizontal scroll bar
uninitialized and it was appearing at the bottom of the listbox when
it did not have to.

Serge Ivanov <sergei@corel.com>
LISTBOX_SetColumnWidth adds extra 2 pixels to the passed column width
(it says it is for column margins). Obviously it is wrong, because
margins must be internal.