Re: Modeline mouse-over message says you can drag the bottom mode-line

[Richard M. Stallman]

    The mouse-over message for the right part of the modeline for a frame 
    with a single window says:

       mouse-1: select (drag to resize), mouse-2: delete others, mouse-3: 
    delete this

    This is not possible of course.

That says what the commands do.  In this situation, they will fail,
but I think that is ok.  I don't think we need to make the tooltips
dynamic.