(bookmark-bmenu-bookmark-column): Remove var.
(bookmark-bmenu-list): Save name on `bookmark-name-prop' text-prop.
(bookmark-bmenu-show-filenames): Use push.
(bookmark-bmenu-hide-filenames): Use local var instead of
bookmark-bmenu-bookmark-column. Use pop. Don't save window-excursion.
(bookmark-bmenu-bookmark): Use the new `bookmark-name-prop' text-prop.
(bookmark-bmenu-execute-deletions): Don't bother adding/removing the
filenames now that the bookmark names are always available.