README: please add about root terminal windows

[vitaly-zdanevich]

Description

Hi, I did not try this software yet (but I will try, thanks for your work), but I think that this is impossible to restore a terminal window after su command? Anyway, for new visitors, I think this is a good to mention in the README.

Side note: I added this to Gentoo GURU https://github.com/gentoo/guru/tree/master/x11-misc/i3-restore

What alternatives have you considered?

No response

[jdholtz]

It does work with su, if you have it in the configuration (and it is there by default). However, it doesn't restore to the correct window when you have a dynamic terminal title (such as in kitty) because you obviously need to type in a password first for the terminal title to match. I can add this to the Readme as a limitation.

Thanks for adding this to Gentoo Guru!

[jdholtz]

Added a new limitations section in the Readme for this. Thanks!