Given a valid session
When I view the Item Estimate screen
A link to exit the session should appear next to my name
And following that link should remove me from the session
And update the screens of all participants to indicate I have left
And navigate to an exit screen that provides a link for me to re-enter the session
Given a valid session
When I view the Item Estimate screen
A link to remove a participant from the session should appear next to each participants name
And if all other participants choose to remove that participant from the session
That participant should be removed from the session
And the screens of all participants should be updated accordingly
And further input from the removed participant should not be honored
(details of behavior for the removed participant TBD)