Fixed multiple custom edit prefs dialog (RAVE-1038)

git-svn-id: https://svn.apache.org/repos/asf/rave/trunk@1514682 13f79535-47bb-0310-9956-ffa450edef68
Properly serialize metadata string for pagesForRender endpoint

git-svn-id: https://svn.apache.org/repos/asf/rave/trunk@1514809 13f79535-47bb-0310-9956-ffa450edef68
merged from trunk

git-svn-id: https://svn.apache.org/repos/asf/rave/branches/angular@1514811 13f79535-47bb-0310-9956-ffa450edef68