bug#33458: 27.0.50; dired loses position when reverted from outside place

[martin rudalics]

> For example, saveplace.el uses dired-initial-position-hook to set
> Dired buffer's point initially to a remembered dired-filename.
>
> A switch-to-buffer hook could do the same to move point to a dired-filename
> previously displayed in that window, by getting the filename from e.g.
> a buffer-local mapping from windows to filenames.

The downside of such an approach is that any buffer-local reference to
a window will assure that the window object cannot be reclaimed by the
collector as long as the buffer is live, even when the window is not
stored in a configuration any more.  Not that I consider this a great
downside though.

martin