#17 Display cursor coordinates completely

[Ofri Sadowsky]

I would be really happy if I could find the coordinates
of the current pixel in mm, including any
submillimetric accuracy, and in the frame of reference
of the study. For example, suppose I have a CT scan
with 1.5mm slice spacing, and 0.84mm pixel size, and
the study frame of reference is
translated to -200 -200 -183. Then for the 6th slice in
pixel coordinate (x, y) I want to see something like
(-200 + 0.84*x, -200 + 0.84*y, -175.5).

Currently, the RAS coordinates only show the integer
part of the coordinate. But often this is not enough.