bug#32825: 27.0.50; Deterministic window management

[martin rudalics]

> This is easy to fix, but I'm not sure if this might break some packages
> that depend on TAGS buffers with original names.

That's what I thought too.

> Maybe better to represent a list of prev/next buffers as a tree?
> Then inserting a new buffer inside it will create a leaf that
> can be ignored for navigation.  An analogy of this is undo-tree.

But then 'display-buffer-in-previous-window' would have to navigate a
tree and I would like to not make it too complicated because it may
have to consider "some" windows as possible candidates.
'switch-to-prev-buffer' OTOH has only one candidate window and can be
made a bit more complicated, if necessary.

martin