At the moment, the dashboard is broken out of the box. I couldn't get it to work until I changed variable refresh from "On Dashboard Load" to "On Time Series Change".
Would you be willing to post a LICENSE and perhaps NOTICE file on this repo to declare what license if any you want it to have? Ideally for me, you would choose Apache 2.0. :-)
I won't be using your dashboard directly, but I did learn from your approach and would like to give you credit in my reimplementation of a small part of your dashboard.