make the unread message row's font bold and the read ones normal, see issue#33

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522316 13f79535-47bb-0310-9956-ffa450edef68
1.do not select the message which is being focused on. 2.create the mark popup menu

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522317 13f79535-47bb-0310-9956-ffa450edef68