bug#47300: delete-window to select window with same position

[Juri Linkov]

tags 47300 fixed
close 47300 28.0.50
thanks

> Pushed now.  Feel free to change it if you have better ideas.

Thank you for implementing this useful feature.
The name proposed by Eli is also good.
So this request could be closed now.

PS: I propose one additional tiny change - maybe would be better
to add for @code{delete-window-choose-selected} a xref
or pxref from the "Change Window" node of the User Manual
to the Lisp Reference Manual (there are already many
references to elisp in emacs/windows.texi.)