title: Why calling cancelAllLocalNotifications removes/clears Notification Center?
body: <p>Using <code>cancelAllLocalNotifications</code> should basically <code>cancel the delivery of all scheduled local notifications</code>. But it goes ahead and clear the history as well, and as a result the Notification Center doesn't show the last 1/5/10 recent items/notifications.</p>
  
  <p>I'm not sure if it's a bug or is this intentional? </p>
  
  <p>Perhaps i should use <code>cancelLocalNotification:</code> to cancel only scheduled local notifications (that are scheduled to fire in the future). But will that have an impact on the <code>64</code> local notifications limit?</p>