add display off option (#920)

mostly for laptops to save power

.local/bin/sysact

@@ -14,7 +14,8 @@ cmds="\
 ♻ renew dwm	kill -HUP $(pgrep -u $USER "\bdwm$")
 🐻 hibernate	slock ${hib:-systemctl suspend-then-hibernate -i}
 🔃 reboot	${reb:-sudo -A reboot}
-🖥 shutdown	${shut:-sudo -A shutdown -h now}"
+🖥 shutdown	${shut:-sudo -A shutdown -h now}
+📺 display off 	 xset dpms force off"
 
 choice="$(echo "$cmds" | cut -d'	' -f 1 | dmenu)" || exit 1