Merge changes Ic4370fa8,I81c43329,Ic563a8fe,I6d4be770,I858d1c95, ...

* changes:
  Fixed a bug where a wrong notification could be visible
  Fixed a bug where the icon would dissappear
  Continued low-priority group implementation
  Fixed an issue where the minimum height wasn't applied correctly
  Worked around a bug where the view could render blank
  Fixed another memory leak
  Creating the right views for low-priority group children
  Move the inflation away from the statusbar