bug#32736: bug#34715: bug#32736: 26; Bind `C-x 5 2' to `clone-frame' by default

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: 34715@debbugs.gnu.org,  32736@debbugs.gnu.org
> Date: Thu, 02 Sep 2021 09:44:24 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Shouldn't we copy the parameters alist?  Maybe even deep-copy?
> 
> Do you mean in this particular test case or in `clone-frame'?  If it's
> the latter, the list we get is fresh (but not very deep).

You mean, we get a fresh list because of the call to seq-filter?
(Which btw means we now need to preload seq.el?)  Is that guaranteed
to return a copy of the original alist?

And the faces aren't copied, I think, they reference the same faces
the original frame had.