Feature Request: Update "Chart Average Hash Rate" in Dashboard to reflect the average of selected worker (or workers)

[tinsami1]

When you select one of more workers in the list below the chart, the chart updates to show the hashrates of selected workers. But the Chart Average Hash Rate remains to show the average of the total of all workers (see image below).

It would be helpful if this also updates to show the average of the selected workers.

[Bathmat]

Similar to: Add worker average hashrate columns to dashboard