org-list: interactive tools use new structures

org-list: interactive tools use new structures

* org-list.el (org-list-repair): removed optional argument
  FORCE-BULLET. The job of this interactive function is to completely
  fix a list at point. Changing bullets is a separate task. Also
  removed others optional arguments TOP and BOTTOM to follow the new
  structures.
(org-list-indent-item-generic): remove need for TOP and BOTTOM. STRUCT
is a new required argument. This avoids computing a list structure
many times when function is called more than once in a row, for
example in org-cycle-item-indentation. Use new accessors. Now, also
call `org-update-checkbox-count-maybe'.
(org-outdent-item,org-indent-item,org-outdent-item-tree,org-indent-item-tree):
remove need for TOP and BOTTOM.
(org-list-insert-item-generic): reflect changes to `org-list-repair'.
(org-list-exchange-items): use new accessors. Now modify struct to
avoid re-reading it later.
(org-move-item-down): reflect changes to `org-list-repair'. Use new
accessors.
(org-move-item-up): reflect changes to `org-list-repair'. Use new
accessors.
(org-cycle-list-bullet): use new structures. Also use a shortcut to
`org-list-struct-fix-struct' in order to avoid unnecessary fixes, like
`org-list-struct-fix-box'
(org-sort-list): use of new structures. Renamed an internal function
for a little more clarity.
(org-cycle-item-indentation): remove dependency on org-list-repair.
Use new accessors.
(org-list-get-child): correct bug when asking for the child of the
last item
(org-list-exchange-items): use new accessors.