Features

1. Now you can setup how many times repeat sound notification.
2. Also now you can setup alert message then new chat request comes if regular notifications is not enough for you.

These two enchancements were sponsored and client agreed to share with community them!

You will find two new fields in "Synchronisation and sound settings" section.

execute doc/update_db/update_55.sql for update and follow standard upgrade tutorial I have also updated a little bit index.php file so it would be good if you replaced it also :)