Custom sort for Bar and Column Chart

I have similar need, but as a workaround to what looks like a defect. I'm using a numeric value as the Break by, which sorts as expected in the Break by panel list of members. But in the widget output and legend, it's sorting alphabetically. I cannot know or list out all the members of the field used in the Break by. Can a version of your script here be used to force the sort to be numeric