Revert "Re-do contextual notification header images"

This reverts commit 1f2a7bdb9d726cee1aa40e4a3eccd3c6583761b0.
Changed contextual notification panel headers

See images - http://i.imgur.com/PupEJ5p.jpg

Change-Id: If848d162523610946c317919d2f6664d891906e6