manage tasks outside of task list
    
    The task list isn't very good for tracking tasks as
    they come and go, since it replies on the groaty details
    of toggle buttons and widget activation and such.
    
    We now use it soley for display purposes when necessary
    and otherwise, keep track of the tasks in a separate list.
    
    Also, differentiate single authentication modes from
    multiple authentication modes, so we don't show the task list
    when we don't need to.