bug#50679: 28.0.50; outline-minor-mode-cycle should be able to only cycle at the begining of a line

[Juri Linkov]

>> Then you can customize it to 'bolp'.
>
> I just tried it out, and it looks good. The only thing I wonder is if
> this should apply to both outline-minor-mode and outline-mode?

You are right, this problem exists only for outline-minor-mode,
so it should be rather:

    :filter ,(lambda (cmd)
               (when (and (outline-on-heading-p)
                          (or (not outline-minor-mode)
                              (not (functionp outline-minor-mode-cycle-filter))
                              (funcall outline-minor-mode-cycle-filter)))
                 cmd))