scrub login view code, use css by a unique way

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522277 13f79535-47bb-0310-9956-ffa450edef68
split the layout panel to little ones

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522278 13f79535-47bb-0310-9956-ffa450edef68