wx.Grid: column expansion limited

In my wx.grid.Grid displays EnableDragColSize is set to True, but there is
a limit to how wide the display can be set without shrinking, or cutting
off, the right-most column.

   I can expand the frame but cannot expand the grid width (by increasing the
width of individual cells) to fill the frame. I do not see what limits this
when I read the wx.grid API page.

   A small example can be created if that's desired.

Rich