Blocking menu style

src/freedombone-controlpanel

 function domain_blocking {
     while true
     do
-        data=$(mktemp 2>/dev/null)
-        dialog --backtitle $"Freedombone Control Panel" \
-               --title $"Domain or User Blocking" \
-               --radiolist $"Choose an operation:" 14 60 6 \
-               1 $"Block a domain or user" off \
-               2 $"Unblock a domain or user" off \
-               3 $"Block an IP address" off \
-               4 $"Unblock an IP address" off \
-               5 $"Show blocked domains and users" off \
-               6 $"Back to main menu" on 2> "$data"
-        sel=$?
-        case $sel in
-            1) rm -f "$data"
-               break;;
-            255) rm -f "$data"
-                 break;;
-        esac
-        case $(cat "$data") in
+        W=(1 $"Block a domain or user"
+           2 $"Unblock a domain or user"
+           3 $"Block an IP address"
+           4 $"Unblock an IP address"
+           5 $"Show blocked domains and users")
+
+        # shellcheck disable=SC2068
+        selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"Domain or User Blocking" --menu $"Choose an operation, or ESC for main menu:" 13 70 6 "${W[@]}" 3>&2 2>&1 1>&3)
+
+        case $selection in
             1) domain_blocking_add;;
             2) domain_blocking_remove;;
             3) ip_blocking_add;;
             4) ip_blocking_remove;;
             5) domain_blocking_show;;
-            6) rm -f "$data"
-               break;;
         esac
-        rm -f "$data"
     done
 }