[Feature Request] Highlight panes running as root

[mstarongithub]

I'd like to request a feature for highlighting individual panes that are running with root permissions, similar to how Gnome's Console does.

Example: I have a pane open where I need to edit fstab (for whatever reason). I'd then run sudo ed /etc/fstab. While the command is running, it would be running with root permissions. During that time, I'd like to have some visual highlight for that fact, lets say that this highlight is a red border for that pane. And while unfocused, it darkens.

I have looked for a possible API methods to achieve this effect, but haven't found anything that would enable recreating this feature.

A possible idea for detecting if a pane is rootfull would be to check its id (via $EUID as example) and enable root colouring if it's 0. I believe the relevant detection function in Gnome Terminal would be this one.