## Bug description

Trying to look at insights for feature flags no longer works (see screenshot below).

<img width="1329" alt="" src="https://user-images.githubusercontent.com/5864173/100642031-de24cb00-32fd-11eb-88b4-047c4f82124f.png">


Removing the breakdown works but then you can't see the difference between the binary values.

![image](https://user-images.githubusercontent.com/5864173/100642046-e2e97f00-32fd-11eb-8ae5-4238f899c8b8.png)


## Expected behavior

Insights should be shown as before.


## How to reproduce

1. Click on the insights link on any feature flag row.

## Environment

Cloud (Clickhouse).

## Additional context



#### *Thank you* for your bug report – we love squashing them!

ee/clickhouse/queries/test/test_trends.py
"date_from": "-14d",
                        "breakdown": "name",
                        "breakdown_type": "person",
                        "actions": [{"id": action.pk, "type": "actions", "order": 0}],
                    }
                ),
                self.team,
            )
            event_response = ClickhouseTrends().run(
                Filter(
                    data={
                        "date_from": "-14d",
                        "breakdown": "name",
                        "breakdown_type": "person",
                        "events": [{"id": "watched movie", "name": "watched movie", "type": "events", "order": 0,}],
                    }
                ),
                self.team,
            )
        self.assertListEqual([res["breakdown_value"] for res in event_response], ["person1", "person2", "person3"])
        for response in event_response:
            if response["breakdown_value"] == "person1":
                self.assertEqual(response["count"], 1)
                self.assertEqual(response["label"], "watched movie - person1")
            if response["breakdown_value"] == "person2":
                self.assertEqual(response["count"], 3)
            if response["breakdown_value"] == "person3":
                self.assertEqual(response["count"], 3)
        self.assertTrue(self._compare_entity_response(event_response, action_response,))
    def test_breakdown_filtering(self):