WstValueTable: Add method to find out wether the Qs are 'fake' This happens in import process when no Q values are found (they are set to zero). As consequence, these datasets can only be drawn as markers to an axis.

SYMBOLSET
SYMBOL
  NAME 'point'
  TYPE ELLIPSE
  POINTS
    1 1
  END
  FILLED TRUE
END
SYMBOL
  NAME "square"
  TYPE VECTOR
  POINTS
    0 0
    0 1
    1 1
    1 0
    0 0
  END
  FILLED TRUE
END
END