Thank you for the quick reply. I see the issue, and concur that the node-red dashboard is not very responsive. A back button and external navigation, however, would be a great HDMI addition 
We use nodred flows for control processing, and the nodered dashboard is a useful tool for flow development, testing, and simulation.
Dev/testing isn’t done on the HDMI, so I guess the only purpose would be to expose an existing, working UI onto the HDMI. The groov View to MQTT interface isn’t as fluid as nodered, but I don’t know of anything you couldn’t do with groov View and a little time and creativity.