Lars Ingebrigtsen <larsi@gnus.org> writes:

> Mauro Aranda <maurooaranda@gmail.com> writes:
>
>> But I wanted to ask first, do we really want to make this behavior
>> unconditional in the widget library?  Or would it be better to provide
>> it as an option, for customize (and possibly other clients) to set it?
>
> I think an option here would be nice, because I think this is something
> the caller would want to control.

I agree with you.  I've come up with the attached patch, let me know
what you think.

For a quick way to test it, I used the option window-combination-limit:

emacs -Q
M-x customize-variable window-combination-limit

Changing the values, it can be seen when the tag string is filled and
when it's not.