When exporting data from [an insight](https://app.posthog.com/insights/oVHjTLUD), the action names weren't exported, making the CSV a little hard to follow.

As a user, I'd expect to see the same data in the export as I see in the table in-app.

<img width="1012" alt="image" src="https://user-images.githubusercontent.com/154479/166958828-9b3add76-633b-4f1d-ad2b-cf1ea2888b95.png">

posthog/api/test/test_insight.py
self.assertEqual(response_5.status_code, status.HTTP_200_OK)
            self.assertDictContainsSubset(
                {
                    "created_at": "2021-08-23T12:00:00Z",
                    "created_by": self_user_basic_serialized,
                    "updated_at": "2022-01-01T12:00:00Z",
                    "last_modified_at": "2022-01-01T12:00:00Z",
                    "last_modified_by": alt_user_basic_serialized,
                },
                response_5.json(),
            )
    def test_get_saved_insight_items(self):
        filter_dict = {
            "events": [{"id": "$pageview"}],
            "properties": [{"key": "$browser", "value": "Mac OS X"}],
        }
        Insight.objects.create(
            filters=Filter(data=filter_dict).to_dict(), saved=True, team=self.team, created_by=self.user,
        )
        
        Insight.objects.create(
            filters=Filter(data=filter_dict).to_dict(), team=self.team, created_by=self.user,
        )
        
        Insight.objects.create(filters=Filter(data=filter_dict).to_dict(), team=self.team)
        response = self.client.get(f"/api/projects/{self.team.id}/insights/", data={"saved": "true", "user": "true"})
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertEqual(len(response.json()["results"]), 1)
        self.assertEqual(len(response.json()["results"][0]["short_id"]), 8)
    def test_get_favorited_insight_items(self):