Now that formsets guarentee ordering (see [10623]) we can remove the arbitrary...

    # list_editable

    if hasattr(cls, 'list_editable') and cls.list_editable:

        check_isseq(cls, 'list_editable', cls.list_editable)

        if not (opts.ordering or cls.ordering):

            raise ImproperlyConfigured("'%s.list_editable' cannot be used "

                "without a default ordering. Please define ordering on either %s or %s."

                % (cls.__name__, cls.__name__, model.__name__))

        for idx, field_name in enumerate(cls.list_editable):

            try:

                field = opts.get_field_by_name(field_name)[0]

    ``list_editable`` interacts with a couple of other options in particular

    ways; you should note the following rules:

        * To use ``list_editable`` you must have defined ``ordering`` on either

          your model's or your ``ModelAdmin``'s inner ``Meta``.

        * Any field in ``list_editable`` must also be in ``list_display``. You

          can't edit a field that's not displayed!

        * The same field can't be listed in both ``list_editable`` and

          ``list_display_links`` -- a field can't be both a form and a link.

    You'll get a validation error if any of these rules are broken.

    You'll get a validation error if either of these rules are broken.

.. attribute:: ModelAdmin.list_filter