## Is your feature request related to a problem?

When trying to create a filter for a query, value autocompletes are case sensitive. This throws up weird behaviors. 

E.g, with the country name filter entering 'f' as the first letter autocompletes to 'Africa' (and, for some reason, the Isle of Man) and 'France is not listed as an option. Entering 'F' autocompletes to France. 

## Describe the solution you'd like

Not case sensitive results, or else better filtering. Africa shouldn't come up if I only enter 'f'. 

## Describe alternatives you've considered



## Additional context


<img width="886" alt="Screenshot 2022-01-12 at 13 40 00" src="https://user-images.githubusercontent.com/84011561/149151022-6648bc51-c0ff-4116-8611-cb64e88e9483.png">

<img width="887" alt="Screenshot 2022-01-12 at 13 40 11" src="https://user-images.githubusercontent.com/84011561/149151048-86098606-551b-4757-b133-f80b739c4974.png">


#### *Thank you* for your feature request – we love each and every one!

posthog/api/test/test_event.py
with freeze_time("2012-01-15T04:01:34.000Z"):
                for _ in range(12):
                    event_factory(team=self.team, event="5th action", distinct_id="2", properties={"$os": "Windows 95"})
                response = self.client.get(f"/api/projects/{self.team.id}/events.csv")
            self.assertEqual(
                len(response.content.splitlines()),
                11,
                "CSV export should return up to CSV_EXPORT_MAXIMUM_LIMIT events (+ headers row)",
            )
        @patch("posthog.api.event.EventViewSet.CSV_EXPORT_MAXIMUM_LIMIT", 10)
        def test_events_csv_export_over_maximum_limit(self):
            with freeze_time("2012-01-15T04:01:34.000Z"):
                for _ in range(12):
                    event_factory(team=self.team, event="5th action", distinct_id="2", properties={"$os": "Windows 95"})
                response = self.client.get(f"/api/projects/{self.team.id}/events.csv?limit=100")
            self.assertEqual(
                len(response.content.splitlines()),
                11,
                "CSV export should return up to CSV_EXPORT_MAXIMUM_LIMIT events (+ headers row)",
            )
        def test_get_event_by_id(self):