Set tkinter top-level window to "always on visible workspace"

[Skip Montanaro]

> I think you must be using xfce4, not fvwm4 (there's an fvwm3 in
> development). See https://xfce.org/

Both?

% pgrep -fla xfwm4
1803 xfwm4 --replace
539426 xfwm4-settings

% pgrep -fla xfce
1599 xfce4-session
1755 /usr/bin/ssh-agent /usr/bin/im-launch startxfce4
1782 /usr/lib/x86_64-linux-gnu/xfce4/xfconf/xfconfd
...

I kind of assume xfce4 is the session manager sort of thing, while
xfwm4 is the actual window manager.

Skip