Fixed bug where the changing size of the subject label would change the arrangement of the xul elements around it. Not sure why setting width=0px works to fix this, but it does.
Now showing either draft or needs reply icon for person depending on which one is newest.
Reading a conversation now marks it as read (after 2.5s)
Added first pass at tutorial content inside the viewer html document so it shows up as default until you select something.
Changed name of field from 'add an email' to 'add a person'
The 'unanswered' sort order now uses the date of each person's latest needs-reply conversation -- not just whether their most recent conversation needs reply.