Add option "relative frequency" instead of total number for barplots #21
Description
In the barplot view, we can see the Frequency of AEs on the selected day, separated by treatment group. However, a comparison of the absolute numbers between treatment groups is only worthwhile if the underlying number of participants per treatment group is the same, i.e. only with 1:1 randomisation. In case of 1:2 randomisation or similar, it would be nice to have the option (e.g. with a switch) to look at the relative frequencies:
(Number of participants with AE1 in Treatment group A)/(Number of participants in Treatment group A)*100%