key "Alt+Ctrl+Del" /usr/share/icewm/shutdown-dialog
The "alt+r" to restart is one of the choices presented by shutdown-dialog, as edited. If you want a more direct key combination to do IceWM restart, the command to use in .icewm/keys is
sh -c 'kill -s HUP $(pgrep -u `whoami` '\''icewm$'\'')'
But the number of available hotkeys is dwindling. Remembering that "Alt+Ctrl" is aliased to "Super" in .icewm/preferences, "Super+r" is already connected to "gmrun" for the original config; no idea what you have now, or what you might be used to.
Using "sh -c" is needed, because there's nothing reading the "keys" file that can do the needed command substitution inside $( . . . ).
The way you have given yourself permissions for everything in sudo is such a very, very, very bad idea. Beyond the possibility of a mistaken keystroke making permanent changes you don't want, there's the security aspect. Anyone who manages to work their way into your session (happens) has complete control over your system. But that's all entirely your business. Until they add your machine to the list of ones they now own and use it to multiply the attacks they're presenting against me or the services I'm trying to use.
Please undo that.