Just implemented few usability enhancements without required database update

1. Now if there appears unread message browser notification will be shown. Sound will be played.
2. If chat is assigned to the same department, let say you are using chat workflow, it will play sound notification again.
3. Unread messages chat list limit increased to 20 items instead of 10
4. Chat popup window was syncing admin interface although it does not had any place to show this data. It's fixed also now.

So seems all at the moment.