DrawCircularPlane:

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   Represent the Y/Z plane with a circle with arrows for +X/+Y only.
   Draws on the curernt figure.

   Since version 7.
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   Form:
   DrawCircularPlane( qRef, colorSpec, l )
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   qRef       (4,1)    Reference quaternion
   colorSpec   (:)     Color for the axes arrows
   l          (1,1)    Radius of the circle
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Children:

Common: Graphics/Circle
Common: Quaternion/QRand
Common: Quaternion/QTForm