>> Yes.  But maybe read-from-minibuffer-restore-windows would be even
>> better.
>
> And `read-minibuffer-restore-windows' would be even shorter.  Attached.
>
> +  DEFVAR_BOOL ("read-minibuffer-restore-windows", read_minibuffer_restore_windows,
> +	       doc: /* Non-nil means restore window configurations on exit from minibuffer.
> +If this is non-nil (the default), reading input with the minibuffer will
> +restore, on exit, the window configurations of the frame where the
> +minibuffer was entered from and, if it is different, the frame that owns
> +the associated minibuffer window.  If this is nil, no such restorations
> +are done.  */);
> +  read_minibuffer_restore_windows = true;

I recommend to install this patch.  Maybe it's not perfect, but works
reasonably well, and there is the high demand for this feature.
Only such additional patch is necessary: