## 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/trends/breakdown.py
breakdown_filter = breakdown_filter.format(**breakdown_filter_params)
        breakdown_query = breakdown_query.format(
            null_sql=null_sql,
            breakdown_filter=breakdown_filter,
            event_join=join_condition,
            aggregate_operation=aggregate_operation,
            interval_annotation=interval_annotation,
        )
        try:
            result = sync_execute(breakdown_query, params)
        except:
            result = []
        parsed_results = []
        for idx, stats in enumerate(result):
            breakdown_value = stats[2] if not filter.breakdown_type == "cohort" else ""
            stripped_value = breakdown_value.strip('"') if isinstance(breakdown_value, str) else breakdown_value
            extra_label = self._determine_breakdown_label(idx, filter.breakdown_type, filter.breakdown, stripped_value)
            label = "{} - {}".format(entity.name, extra_label)
            additional_values = {
                "label": label,
                "breakdown_value": filter.breakdown[idx]
                if isinstance(filter.breakdown, list)
                else filter.breakdown
                if filter.breakdown_type == "cohort"
                else stripped_value,
            }
            parsed_result = parse_response(stats, filter, additional_values)
            parsed_results.append(parsed_result)
        return parsed_results
    def _determine_breakdown_label(