Revert "Add navigation bar opacity slider"

This reverts commit 7fa6a5315f170e263f48a92985b24d3bf3bc38b4.
Add statusbar and navigation bar opacity slider

Change-Id: I861ed8f006cc42bba09890983df7e72d9bf0c472
Signed-off-by: Roman Birg <romanbirg@gmail.com>