Pretty much the subject describes it all:
For the Trash folder context menu (right click): move the 'Empty Trash' option away from 'Mark as Read'
I have accidentally selected 'Empty Trash' many times when trying to just 'Mark as Read'. (I don't like the counts/badges on the trashcan. 🙂 ) Fortunately I have 'Confirm' enabled for the Trash, so haven't lost anything.
It could perhaps be just a separator to give it some extra space, or put the Empty option a few more entries away.