Different menu style

src/freedombone-controlpanel

 function menu_top_level {
     while true
     do
-        data=$(mktemp 2>/dev/null)
-        dialog --backtitle $"Freedombone Control Panel" \
-               --title $"Control Panel" \
-               --radiolist $"Choose an operation:" 30 70 22 \
-               1 $"About this system" off \
-               2 $"Passwords" off \
-               3 $"Backup and Restore" off \
-               4 $"Show Firewall" off \
-               5 $"Verify Tripwire Code" off \
-               6 $"Reset Tripwire" off \
-               7 $"App Settings" off \
-               8 $"Add/Remove Apps" off \
-               9 $"Logging on/off" off \
-               10 $"Ping enable/disable" off \
-               11 $"Manage Users" off \
-               12 $"Email Menu" off \
-               13 $"Domain or User Blocking" off \
-               14 $"Security Settings" off \
-               15 $"Change the name of this system" off \
-               16 $"Set a static local IP address" off \
-               17 $"Wifi menu" off \
-               18 $"Add Clacks" off \
-               19 $"Check for updates" off \
-               20 $"Power off the system" off \
-               21 $"Restart the system" off \
-               22 $"Exit" on 2> "$data"
-        sel=$?
-        case $sel in
-            1) rm -f "$data"
-               exit 1;;
-            255) rm -f "$data"
-                 exit 1;;
-        esac
+        W=(1 $"About this system"
+           2 $"Passwords"
+           3 $"Backup and Restore"
+           4 $"Show Firewall"
+           5 $"Verify Tripwire Code"
+           6 $"Reset Tripwire"
+           7 $"App Settings"
+           8 $"Add/Remove Apps"
+           9 $"Logging on/off"
+           10 $"Ping enable/disable"
+           11 $"Manage Users"
+           12 $"Email Menu"
+           13 $"Domain or User Blocking"
+           14 $"Security Settings"
+           15 $"Change the name of this system"
+           16 $"Set a static local IP address"
+           17 $"Wifi menu"
+           18 $"Add Clacks"
+           19 $"Check for updates"
+           20 $"Power off the system"
+           21 $"Restart the system")
+
+        # shellcheck disable=SC2068
+        selection=$(dialog --backtitle $"Freedombone Control Panel" --title $"Control Panel" --menu $"Choose an operation, or ESC to exit:" 24 40 17 "${W[@]}" 3>&2 2>&1 1>&3)
+        if [ ! "$selection" ]; then
+            break
+        fi
+
         please_wait
-        case $(cat "$data") in
+
+        case $selection in
             1) show_about;;
             2) view_or_change_passwords;;
             3) menu_backup_restore;;
             19) check_for_updates;;
             20) shut_down_system;;
             21) restart_system;;
-            22) rm -f "$data"
-                break;;
         esac
-        rm -f "$data"
     done
 }