mod_menu: correct pubzub.publish topic.

(cherry picked from commit b01ffd8e4e9ff3243761ff5cd6a14cfd11c12838)
mod_admin_frontend: fix a problem where combining the nestedSortable.js lib with other js files will result in errornous drag behaviour

(cherry picked from commit 47aee7bd233ba1d5da366d95971bc4255c87c622)