Completely hide Halo))) icons while tasking
- previous commit by BigBrother1984 stopped the highlighting of Halo))) icons
  this should remove them completely. Other status bar icons are still highlighted
Kill floating activities running in the same thread when tapping outside
This change makes all activities from the same app to be finished when we tap outside the halo window. Other apps running in different threads
(floating or not) won't be finished.

Change-Id: I3c51eafdcee7032fa90876411da3ff1eae0106c3