## 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
params: Dict[str, Any] = {"team_id": team_id}
        interval_annotation = get_interval_annotation_ch(filter.interval)
        num_intervals, seconds_in_interval = get_time_diff(filter.interval or "day", filter.date_from, filter.date_to)
        parsed_date_from, parsed_date_to = parse_timestamps(filter=filter)
        props_to_filter = [*filter.properties, *entity.properties]
        prop_filters, prop_filter_params = parse_prop_clauses(props_to_filter, team_id)
        aggregate_operation, join_condition, math_params = process_math(entity)
        action_query = ""
        action_params: Dict = {}
        if entity.type == TREND_FILTER_TYPE_ACTIONS:
            action = Action.objects.get(pk=entity.id)
            action_query, action_params = format_action_filter(action)
        null_sql = NULL_BREAKDOWN_SQL.format(
            interval=interval_annotation,
            seconds_in_interval=seconds_in_interval,
            num_intervals=num_intervals,
            date_to=(filter.date_to).strftime("%Y-%m-%d %H:%M:%S"),
        )
        params = {
            **params,