Clear screen before exit message

src/freedombone-sec

       --yesno "\nPlease confirm that you wish your security settings to be changed?\n\nWARNING: any mistakes made in the security settings could compromise your system, so be extra careful when answering 'yes'." 12 60
   sel=$?
   case $sel in
-      1) echo 'Exiting without changing security settings'
+      1) clear
+         echo 'Exiting without changing security settings'
          exit 0;;
-      255) echo 'Exiting without changing security settings'
+      255) clear
+           echo 'Exiting without changing security settings'
            exit 0;;
   esac