When using the histogram graph style, the illustration
of the curve is not shown in the legend.
Fix: Copying the method from the line style worked for
me. There may be better alternatives.
I needed this fix to plot many curves as "staircurves"
(for performance plots), using the
In a single histogram, the illustration may be
superfluous, but I think it does not disturb either.
Omitting the illustration could be made an option in