vpn configuration menu style

src/freedombone-app-vpn

@@ -201,27 +201,20 @@ function configure_interactive_vpn {
     read_config_param VPN_TLS_PORT
     while true
     do
-        data=$(mktemp 2>/dev/null)
+        W=(1 $"Change TLS port (currently $VPN_TLS_PORT)"
-        dialog --backtitle $"Freedombone Control Panel" \
+           2 $"Regenerate keys for a user")
-               --title $"VPN Configuration" \
+
-               --radiolist $"Choose an operation:" 13 70 3 \
+        # shellcheck disable=SC2068
-               1 $"Change TLS port (currently $VPN_TLS_PORT)" off \
+        selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"VPN" --menu $"Choose an operation, or ESC to exit:" 10 60 2 "${W[@]}" 3>&2 2>&1 1>&3)
-               2 $"Regenerate keys for a user" off \
+
-               3 $"Exit" on 2> "$data"
+        if [ ! "$selection" ]; then
-        sel=$?
+            break
-        case $sel in
+        fi
-            1) rm -f "$data"
+
-               return;;
+        case $selection in
-            255) rm -f "$data"
-                 return;;
-        esac
-        case $(cat "$data") in
             1) vpn_change_tls_port;;
             2) vpn_regenerate_client_keys;;
-            3) rm -f "$data"
-               break;;
         esac
-        rm -f "$data"
     done
 }