LN: Some fixes & cleanup
- Fix bug that the notification is launched when a button on it is pressed
- Show new notifications first

Change-Id: I3892ac547cc574ba0cdec3a39f41d8b2e16dd642
Framework: Fix Statusbar showing Clock when it's disabled after unlock

Change-Id: Idf57cf13e427ab29f9d72ed248d36c1783ce09a1