Adding sent notifications to the Notifications page

We will be making a change to the notifications page to include notifications that have been sent by the user. We are doing this so that there is more transparency to users about their application activities and hence less confusion about what apps are sending on their behalf. This requires no implementation changes on the developer's side, but apps that assume the sender of the notification will not see the notification should definitely take note.

We will be rolling this change out next Thursday, October 25th.