I implemented it only for AccountView and MessageViewer as they were the only
context it which it made sens to me.
Feel free to suggest more variables, theese are just the one that I had a use
We'll see... For now that's good enough I think.
I'm more wondering if we should do it for :term as well... but as this is interactive
it could be jarring if the folder doesn't match suddenly, say if you changed folders.
Considering that the env vars are set upon spawning the term this could be ugly.