SLING-2985 : only show jcr_root if the project is configured properly - that is: only if it has the sling.content facet set

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1519971 13f79535-47bb-0310-9956-ffa450edef68
SLING-3032 : minor typo

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1519972 13f79535-47bb-0310-9956-ffa450edef68