the workaround of r149, all of the folders use the same one icon

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522246 13f79535-47bb-0310-9956-ffa450edef68
try to integrate the messages list's panel

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522247 13f79535-47bb-0310-9956-ffa450edef68