Your recent update of having a right arrow imply a thread of messages when clicked on displaying all messages in the thread works fine. However if a new message comes in on a thread there is not an indication (like making it bold) that a new email had been added to the thread. I see I have a new email by the highlighted count circle but I have to exand all the threads until I find the one that has the new incoming email added to it. Making the thread bold would let me know which thread to expand to find the new incoming message.