## Issue:
Closes 5515: All videos marked as read when clicking a single notification from notification list
## Change:
- Augment `doReadNotifications` to only clear the given IDs. If the argument is `null` or is not a valid array (e.g. when used as a click handlers, the click event object is passed in), all notifications will be cleared.
- Augment `NOTIFICATION_READ_COMPLETED` to only clear the given IDs.
## Notes:
- Wasn't sure of the API will fail if the ID is invalid, so I start from `unreadNotifications` first, then only filtering it further with the given ID. Otherwise, we could just skip the `unreadNotifications` filtering.
