make use of setsid(1)'s -f flag (#652)

Co-authored-by: Luke Smith <luke@lukesmith.xyz>

.local/bin/statusbar/pacpackages

@@ -18,7 +18,7 @@
 # Exec = /usr/bin/pkill -RTMIN+8 dwmblocks # Or i3blocks if using i3.
 
 case $BLOCK_BUTTON in
-	1) setsid "$TERMINAL" -e popupgrade & ;;
+	1) setsid -f "$TERMINAL" -e popupgrade ;;
 	2) notify-send "$(/usr/bin/pacman -Qu)" ;;
 	3) notify-send "🎁 Upgrade module" "📦: number of upgradable packages
 - Left click to upgrade packages