Enhancement: Confirmation dialog when deploying to production

[peterhassett]

Impacted plugin

Jetpack

What

I would like a confirmation dialog when I trigger a manual deployment to a production site.

How

As a site admin
I want to have a confirmation step when triggering a manual deploy to a prod site
So I can avoid inadvertent deploys

1. only if site is prod
2. popup shows repo/branch
3. user can close or cancel the popup
4. if user confirms, run the deploy

Note: The URL at top and the color-coded button at top are nice, but I have a few times caught myself nearly deploying code to prod that was meant only for staging. A conditional confirmation dialog should nearly eliminate accidents that would otherwise stress back-end users out.