Users menu style

src/freedombone-controlpanel

 function menu_users {
     while true
     do
-        data=$(mktemp 2>/dev/null)
-        dialog --backtitle $"Freedombone Control Panel" \
-               --title $"Manage Users" \
-               --radiolist $"Choose an operation:" 13 70 6 \
-               1 $"Add a user" off \
-               2 $"Delete a user" off \
-               3 $"Change user password" off \
-               4 $"Change user ssh public key" off \
-               5 $"Reset password tries" 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 $"Add a user"
+           2 $"Delete a user"
+           3 $"Change user password"
+           4 $"Change user ssh public key"
+           5 $"Reset password tries")
+
+        # shellcheck disable=SC2068
+        selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"Manage Users" --menu $"Choose an operation, or ESC for main menu:" 13 70 6 "${W[@]}" 3>&2 2>&1 1>&3)
+
+        if [ ! "$selection" ]; then
+            break
+        fi
+
+        case $selection in
             1) add_user;;
             2) delete_user;;
             3) change_password;;
             4) change_ssh_public_key;;
             5) reset_password_tries;;
-            6) rm -f "$data"
-               break;;
         esac
-        rm -f "$data"
     done
 }