Zooming in log file plots does not work correctly on Windows 8.1

I just recently bought a new laptop with Windows 8.1. I'm using the latest Mission Planner distribution. When I attempt to draw out a rectangle to zoom part of the plot, the rectangle is offset from the cursor like my mockup shows in this screenshot:


It appears that there is an offset error in the rectangular selection logic.

Reproduce the log-file plot zoom operation on Windows 8.1 and inspect the rectangular selection logic used by the plot view. Compare the drawn rectangle with the cursor position; done means the selection stays aligned with the cursor and zooms to the intended area.

Written by the indexing model from the issue text.