Dashboard title from Environment Variable

### Description

I would like to pass in a global environment variable to use as the title on a dashboard page

Something like ${envVar}

In the

Edit ui-page node - properties - name input.

So for example I would have one set of flows I can flash to my pi and it would inherit the environment variable set and maintain it when pulling down updates.

It would be cool if this would work for the 'path' option too.

Was told on Facebook to report here so hopefully this get picked up!

Love all your work!!

### Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate