Function mark_alerts_as_seen

mark_alerts_as_seen(alerts: UserAlerts): Promise<UserAlerts>
Changes event status in database from "Unseen" to "Seen" and then prepends unseen alerts to seen alerts list.
Parameters
- alerts: UserAlerts
  Current user alerts object.
Returns Promise<UserAlerts>
Updated user alerts object.
- Defined in app/lib/account/account_db_utils.tsx:797