Properly serialize metadata string for pagesForRender endpoint

git-svn-id: http://svn.apache.org/repos/asf/rave/trunk@1514809 13f79535-47bb-0310-9956-ffa450edef68
Fixed widget menu remains open after item is clicked (RAVE-1041)


git-svn-id: http://svn.apache.org/repos/asf/rave/trunk@1514851 13f79535-47bb-0310-9956-ffa450edef68