[1.4.X] Fixed #16309 - Made ModelAdmin.list_filter versionchanged annotations...

.. attribute:: ModelAdmin.list_filter

    .. versionchanged:: 1.4

    Set ``list_filter`` to activate filters in the right sidebar of the change

    list page of the admin, as illustrated in the following screenshot:

          class PersonAdmin(UserAdmin):

              list_filter = ('company__name',)

    .. versionadded:: 1.4

    * a class inheriting from :mod:`django.contrib.admin.SimpleListFilter`,

      which you need to provide the ``title`` and ``parameter_name``

      attributes to and override the ``lookups`` and ``queryset`` methods,

                                    birthday__lte=date(1999, 12, 31)).exists():

                          yield ('90s', _('in the nineties'))

    .. versionadded:: 1.4

    * a tuple, where the first element is a field name and the second

      element is a class inheriting from

      :mod:`django.contrib.admin.FieldListFilter`, for example::