make it look more beautiful

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522198 13f79535-47bb-0310-9956-ffa450edef68
make it look more beautiful

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522199 13f79535-47bb-0310-9956-ffa450edef68
fixed unread mail bug with just not dealing with it, for the west view should be replaced by Cell Tree in the future.

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522200 13f79535-47bb-0310-9956-ffa450edef68