* I honestly don't know why this fixes it really. I finally got a
reliable repro which involved somehow scrollbars becoming visible and
creating their window handles in a weird circumstance while dragging
the window off fullscreen, and that causing the window handle create
to fail.
* When jumping between draws the tables are rebuilt which destroys any
vertical scrolling, so we save/restore it which means the same row will
be at the top of the view. If there are fewer resources it'll just be
as scrolled down as possible.
baldurk