Feature Request. Option to change node colours for different Bridges

[GeoffNT]

I run 2 different Z2M instances and it would be ideal if I could distinguish easily in my flows which nodes use which server by a change in colour.

I have used Hubitat nodes in the past and that had a custom colour option in the server/bridge node set up that enabled just that so that all devices connected to one server where one colour and all connected to the other where another.