decorate columns of messages list and related panels above and below.

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522203 13f79535-47bb-0310-9956-ffa450edef68
fixing weird error in compilation:  Deferred binding failed for 'com.google.gwt.user.client.ui.NativeHorizontalScrollbar'

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522204 13f79535-47bb-0310-9956-ffa450edef68