bug#10945: Can't search through help menu.

[npostavs]

Drew Adams <drew.adams@oracle.com> writes:

>> IMO any key that isn't bound should fallback to its standard binding,
>> and the keys should only apply when the focus is in the minibuffer, like
>> other prompts (e.g., find-file).
>> 
>> In terms of implementation, I think this would mean binding the map
>> only in the minibuffer instead of using read-key-sequence.
>
> I don't have time to check now, but I think that the minibuffer
> is not involved here at all.  Instead, an event is read directly.

Yes, I'm suggesting to change that.

> IOW, this is more akin to `y-or-n-p': there is a prompt, but is
> not for reading input from the minibuffer.

> And the keymap used is a local one created by
> `help-for-help-internal', which is a function defined
> using `make-help-screen'.