Coord-system-3d

[Jochem-L]

The icons coord-system-3d and coord-system-3d-alt are lefthanded, which means the y axis is found clockwise from the x axis instead of anticlockwise (when looking from above, in opposite direction as the z axis is pointing). This is very unusual for coordinate reference systems. I think this could best be fixed by switching the letters x and y in these two icons.

[Viglino]

Updated: cdc4c3e#diff-0a122fd41a95f1595350ae67b1fb106bf7a2b27202bfdb55ce87a560cb62b0e5