allow use many to many relations

allow use many to many relations in dependent fields
```
color_by_model:
            class: AppBundle:AutoColor
            parent_property: models
            many_to_many: true
            property: name
            no_result_msg: Сначала выберите модель
```
Now you can use many_to_many options and parent field will be filteres using IN statement, instead of equal(=).