* 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.
* This is the proper fix for 87bcde1c which is also more explicit about
what is going wrong. Thanks to the anonymous user who mentioned that they
clicked auto-fit before hitting the range histogram crash, which got me
on the right path to track down the exception!
* Crash report came in with System.OverflowException inside FillPolygon,
but I don't see a way for these values to get too large (or invalid
some other way).
baldurk