Administrator email menu style

src/freedombone-controlpanel

 function menu_email {
     while true
     do
-        data=$(mktemp 2>/dev/null)
-        dialog --backtitle $"Freedombone Control Panel" \
-               --title $"Email Menu" \
-               --radiolist $"Choose an operation:" 15 70 8 \
-               1 $"Add a user to a mailing list" off \
-               2 $"Remove a user from a mailing list" off \
-               3 $"Add an email rule" off \
-               4 $"Block/Unblock an email address" off \
-               5 $"Block/Unblock email with subject text" off \
-               6 $"Outgoing Email Proxy" off \
-               7 $"Extra email domains" off \
-               8 $"Back to main menu" on 2> "$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 to a mailing list"
+           2 $"Remove a user from a mailing list"
+           3 $"Add an email rule"
+           4 $"Block/Unblock an email address"
+           5 $"Block/Unblock email with subject text"
+           6 $"Outgoing Email Proxy"
+           7 $"Extra email domains")
+
+        # shellcheck disable=SC2068
+        selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"Email Menu" --menu $"Choose an operation, or ESC for main menu:" 15 70 8 "${W[@]}" 3>&2 2>&1 1>&3)
+
+        case $selection in
             1) add_to_mailing_list;;
             2) remove_user_from_mailing_list;;
             3) email_rule;;
             5) block_unblock_subject;;
             6) email_smtp_proxy;;
             7) email_extra_domains;;
-            8) rm -f "$data"
-               break;;
         esac
-        rm -f "$data"
     done
 }