AMBARI-1316. Vertical scrollbar shows regardless of how tall the browser height is (content height is always slightly taller than viewport). (Arun Kandregula via yusaku)

git-svn-id: https://svn.apache.org/repos/asf/incubator/ambari/trunk@1440756 13f79535-47bb-0310-9956-ffa450edef68