Fix bug with M-x info

Apparently not everything using `display-buffer` results in a newly
popped up, unselected window.  `M-x info` was using
`pop-to-buffer-same-window` which does invoke `display-buffer`, but with
a special action that gets translated into a peculiar ALIST value.  This
commit takes care of making such a value reuse the currently selected
window.
Bump version