Some of our users are just to used to using a mouse. That is way I'm making this request for them.
As it is now, one can use Alt+F8 to hide the session pane, but mouse lovers hate the keyboard! So what I was thinking was to make a button to achieve the function as Alt+F8 does. See attached ugly picture, to see what I mean!
This is a good idea, I added your request to our todo list.