This is a simple workaround for the fact that Matlab's BAR and BARH
plotting functions do not pass the 'FaceAlpha' property to the actual
* in case you want to have the grid lines shine through the bars
* in general in case you want to have some graphics behind your
* or, in case you simply prefer the faced out colors.
Hopefully, this function gets obsolete in some future Matlab release.
fixed the description text