LocalizedFieldsAdminMixin can be used with inlines
LocalizedFieldsAdminMixin can be used with inlines

LocalizedFieldsAdminMixin was inheriting from ModelAdmin. This means in a code like this

```python
class FooInline(LocalizedFieldsAdminMixin, admin.TabularMixin):
    pass
```

`__init__` was being resolved to `ModelAdmin.__init__` which is clearly wrong.
SectorLabs/django-localized-fields,SectorLabs/django-localized-fields,SectorLabs/django-localized-fields