GVMVU.contour has wrong scale plotting to a 3DV.

[ianneilmacleod]

a4c64c8

at line 855 in group.py we call GXMVU.contour. For a 2D view the scaling of line detail (thickness, annotation height etc) is as expected. For 3D views the scale is wrong - to my eye it seems stuck at a scale of 1000, which is the default map scale when the "data" view is open. In a 3DV there is only one view, the "3D" view and this is the "data" view. Since the view is open calling GetMapScale will return 1000, which I suspect is the problem. Internally I think it should be getting the scale from the view. Just a thought.