PIVOT-689, backport from trunk the fix to let ScrollPane in Terra skin to use a right background color (and not a fixed white).
You can see the changes now for example running any application with a custom color scheme (like the dark example).

git-svn-id: https://svn.apache.org/repos/asf/pivot/branches/2.0.x@1615882 13f79535-47bb-0310-9956-ffa450edef68