bug#59381: Should xref--marker-ring be per-window?

[Ackerley Tng]

Hi,

While using xref (xref-find-definitions and xref-find-references, etc)
in separate windows, I hit M-, to pop the marker stack expecting that
each window should have a separate stack.

However, it seems that the entire emacs instance shares a single
xref--marker ring.

Could we have separate xref--marker-rings per window, or some
configuration option to enable that?

I have some patches that I could submit, if that helps!

Thanks,

Ackerley