Re: No "back" button in *Help* with `C-x n n'

[Richard Stallman]

    However, the second problem seems more serious: in the *Disabled
    Command* buffer clicking on `save-restriction' pops up its help text

What is the precise complete series of input that you give?
How do you get a chance to click on that function name in the
*Disabled Command* buffer?

The buffer is displayed only while Emacs asks one question, reading
one input event, and then disappears.  If you click while it asks that
question, that causes an error.  (I will fix it to respond more nicely
in that case.)  So I don't see what your scenario is.