Revert "First Attempt for full navbar transparency in Trebuchet."

This reverts commit 94d8b3112b031a9b0a0afe0b9d5cedb445bd6d21

Some users with xxhdpi hare reporting FCs, will rework and resubmit.

Change-Id: I6f3e5f75a4809ae917bc44bace7860dd5177f036