Revert "FB: Slimrecents background color && transparency [1/2]"

This reverts commit f2a77cdea3d5ac67427ce9a9e370c0219ab412dc.
FB: Slimrecents background color && transparency [2/2]

Change-Id: Icf0259ce45d416364d6e7a7a8c2038f6c4c0cbde