bug#36417: [PATCH] Document bookmark annotations in Emacs Manual

[Drew Adams]

> > Btw, what is the use case for using annotations but not showing them?
> > If that use case is not important enough, perhaps we shouldn't mention
> > the second option.
> 
> Good point.  I don't think it's a very important use case, so I
> removed it.

It should not be removed.  Many users like to have
an annotation-edit/create buffer displayed whenever
they set (create or update) a bookmark.  Many other
users do not want this behavior, but prefer to add
or edit an annotation only on demand.

This option is at least as important as the other
one.

In both cases a user can prefer to only deal with
annotations on demand - not have them popped up
in their face.  But for users who do want them in
their face, they can want that for setting or for
jumping, or for both.