[NGRM] - cursor readout Z value is wrong when Z scaling is applied

[w1nklr]

Use any subsurface viewer storybook example. Increase Z scaling (using up arrow). Move pointer above graphics

=> the readout shows Z value that includes the Z scaling factor.

In this example, the 3D axis shows a Z range from 0 to -2000, while the readout shows about -9300