## Allow Boxplot widths in Graph Builder to be proportional to group size

I'm often asked whether it's possible to make boxplot widths in Graph Builder proportional to group size, and I think this would be a very useful option.

In Fit Y by X this works by using a proportional X axis. Since JMP 14 it's also possible to indicate group sizes by using Caption Box with Per Factor, which is great, but proportional widths would make differences more obvious.