CHUI-489: Found a bug in last commit for this issue. The sound notification...

CHUI-489: Found a bug in last commit for this issue. The sound notification (for inventory/teleport offer) would be played for the toast popup as well as once the conversations floater was opened. And also when a button was clicked in the conversation floater to 'accept' or 'deny' the offer. Now only playing the sound notification when the initial offer has been made.