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
dashboards = validated_data.pop("dashboards", None)
        if dashboards is not None:
            old_dashboard_ids = [tile.dashboard_id for tile in instance.dashboardtile_set.all()]
            new_dashboard_ids = [d.id for d in dashboards]
            ids_to_add = [id for id in new_dashboard_ids if id not in old_dashboard_ids]
            ids_to_remove = [id for id in old_dashboard_ids if id not in new_dashboard_ids]
            for dashboard in Dashboard.objects.filter(id__in=ids_to_add):
                if dashboard.team != instance.team:
                    raise serializers.ValidationError("Dashboard not found")
                DashboardTile.objects.create(insight=instance, dashboard=dashboard)
            if ids_to_remove:
                DashboardTile.objects.filter(dashboard_id__in=ids_to_remove, insight=instance).delete()
        updated_insight = super().update(instance, validated_data)
        changes = changes_between("Insight", previous=before_update, current=updated_insight)
        name_for_logged_activity = (
            updated_insight.name
            if updated_insight.name is not None and len(updated_insight.name) > 0
            else updated_insight.derived_name
        )
        log_activity(
            organization_id=self.context["request"].user.current_organization_id,
            team_id=self.context["team_id"],
            user=self.context["request"].user,
            item_id=updated_insight.id,
            scope="Insight",
            activity="updated",
            detail=Detail(name=name_for_logged_activity, changes=changes, short_id=updated_insight.short_id),
        )
        return updated_insight
    def get_result(self, insight: Insight):