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/insight.py
)
from posthog.decorators import cached_function
from posthog.helpers.multi_property_breakdown import protect_old_clients_from_multi_property_default
from posthog.models import DashboardTile, Filter, Insight, Team
from posthog.models.activity_logging.activity_log import (
    ActivityPage,
    Detail,
    changes_between,
    load_activity,
    log_activity,
)
from posthog.models.activity_logging.serializers import ActivityLogSerializer
from posthog.models.dashboard import Dashboard
from posthog.models.filters import RetentionFilter
from posthog.models.filters.path_filter import PathFilter
from posthog.models.filters.stickiness_filter import StickinessFilter
from posthog.models.insight import InsightViewed, generate_insight_cache_key
from posthog.permissions import ProjectMembershipNecessaryPermissions, TeamMemberAccessPermission
from posthog.queries.util import get_earliest_timestamp
from posthog.settings import SITE_URL
from posthog.tasks.update_cache import update_insight_cache
from posthog.utils import (
    format_query_params_absolute_url,
    get_safe_cache,
    relative_date_parse,
    should_refresh,
    str_to_bool,
)
logger = structlog.get_logger(__name__)
class InsightBasicSerializer(serializers.ModelSerializer):