fix bugs, including 1)folders appending on west panel; 2)unread email folder's been frozen exception; 3)back, logout, ...buttons wired behavior.

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522201 13f79535-47bb-0310-9956-ffa450edef68
make messages list pager be available

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522202 13f79535-47bb-0310-9956-ffa450edef68