Get choice

src/freedombone-controlpanel

                          --radiolist $'Choose:' \
                          30 40 20 $applist)
 
-        sel=$?
-        case $sel in
-            1) return;;
-            255) return;;
-        esac
-        selected_index=$(cat $data)
-        selected_index=$[selected_index-1]
-        app_name=${app_list[selected_index]}
+        if [ $? -ne 0 ]; then
+            break
+        fi
+        app_index=$[choice-1]
+        app_index=$[app_index-1]
+        app_name=${app_list[app_index]}
 
         # exit
         if [[ "$app_name" == "$ExitStr" ]]; then