[RFR] Make Reference column link to related edit view by default

```js
        comment.listView()
            .title('Comments')
            .addField(new Reference('post_id')
                .label('Post title')
                .map(truncate)
                .targetEntity(post)
                .targetField(new Field('title'))
            )
```

renders like:

![image](https://cloud.githubusercontent.com/assets/99944/5180211/4c3559a0-7489-11e4-8bb1-1a102f15ee2c.png)

`return relatedEntity && relatedEntity.editionView().isEnabled()` ?