Closes #40 Notificaiton View Issue

Instead of making a new view to handle hiding the notification view, I
fixed the memory leak where each time a user created a new item, it
would create a new notification view and I set the notification's hidden
property to true to hide it until it is needed and then it unhides
itself, presents itself and then hides itself again.
Merge pull request #45 from bafipawi/fixItemNotificationView

Closes #40 Notificaiton View Issue