make Qubes / Whonix graphical user interface (GUI) applications that require root compatible with wayland

[adrelanos]

In wayland it's no longer easily possible to run lxsudo application. I found many users asking how to do that, workarounds. But I haven't found any cannoncial suggestion for developers how that should now be implemented.

This might only affect (Qubes-)Whonix as I am not sure Qubes has any GUIs that perform actions which require root rights (except probably the installer).

Affected application examples:

• anon-connection-wizard (writing Tor configuration)
• tor-control-panel (same as above)
• repository-dist-wizard (writing APT sources list)

Options:

• PolicyKit (deprecated, replaced by polkit)
• polkit: Has itself security vulnerabilities.
• dbus: Same as above.
• sudo: I doubt Qubes can ever fully get rid of sudo?

Maybe Qubes has long term goals to get rid of a default installed polkit / dbus?

The new implementation should also be compatible with Qubes long term plans:
#2695

I am wary of porting to polkit or dbus, if not knowing the Linux desktop's long term vision on GUI vs root and/or how likely that these options are soon invalidated.

If there is no guidance, I'll probably implement this sudo based solution:
https://unix.stackexchange.com/a/423287/49297