Dear VXL Maintainers,
I am thinking of changing the zoom action on vgui_viewer2D_tableau. It is
more convenient, especially for large images, to zoom around the point that
is clicked. So for example, if one clicks CNTL_LEFT near the edge of the
viewport, the image will zoom in and scroll so that the clicked point is at
the center of the viewport. Unless I hear negative comments, I will make
the change in a few days.