Features

1. Option to force department hours to take priority over users online status. "Chat configuration" -> "Misc" -> "Ignore users online statuses and use departments online hours".
2. Option to redirect user to leave a message window manually.

execute doc/update_db/update_73.sql for update and follow standard upgrade tutorial.

P.s These two enhancements were inspired by this forum thread. If anyone has more cool ideas, don't be shy and share them https://groups.google.com/forum/#!topic/livehelperchat/XmdUZeyVzjU