Name of function for plotting on website (documentation or make flexible)

[hauenst]

It seems that the function name has to be "Fit" to be plotted on top of the histogram in the timelines. This how it works to get the new double gaussian fit to be plotted for the DC histograms. A documentation on this would be good or we make the function name flexible i.e. if several functions exist one can pick the one plotted on top of the histograms