Zoom in on multiple row/column selection from search

[Anastasia Baryshnikova]

If your search finds multiple rows or columns (not consecutive) & you want to zoom in on them, Treeview zooms in the middle (or somewhere random, i'm not sure) and it's not clear what's going on. I think the behaviour in this case should be to zoom in to the entire range of rows or columns selected.

[Robert Leach]

I've worked with this same code related to other issues, so I'll take a look.

[Robert Leach]

The math to calculate the selected area sizes did not account for non-contiguous selections, as you can have from searching. Re-did the math to calculate the size of the selected area to be max-min+1.