[Enhancement]: Make pie chart legend respect sortFunction.

[danxcraig]

Summary

Request (Development)
Ensure that the Pie/Donut chart legend respects sortFunction order.

Background
PR1043 solved custom sorting order for Pie and Donut Charts, but did not account for altering the sort order of the Legend.

In the example below, the legend order does not respect the donut sort order.

const groupOrders = ['Amazing', 'Ok', 'Awful'];

pie: {
    sortFunction: (a: any, b: any) => {return groupOrders.indexOf(a.group) - groupOrders.indexOf(b.group)},
}

Justification

Having an inconsistent order is a confusing user experience, which affects overall Product Experience.

Desired UX and success metrics

The legend sort order matches the data sort order

"Must have" functionality

As above

Specific timeline issues / requests

No specific timeline

Available extra resources

If you can tell me where to look, I can play around and submit a PR.

[danxcraig]

🤦‍♂️ Never mind. I just discovered Legend > Order.