ACE-1977: Ensure that Relevance sort property has a value of null and not "null"

git-svn-id: https://svn.alfresco.com/repos/alfresco-open-mirror/alfresco/HEAD/root@73391 7033f55c-6c29-4ad8-afba-765cb616e738
ACE-1830: Corrected merge error

git-svn-id: https://svn.alfresco.com/repos/alfresco-open-mirror/alfresco/HEAD/root@73397 7033f55c-6c29-4ad8-afba-765cb616e738
ACE-1977: Ensure hash in URL honours initial sort field and sort ascending state

git-svn-id: https://svn.alfresco.com/repos/alfresco-open-mirror/alfresco/HEAD/root@73456 7033f55c-6c29-4ad8-afba-765cb616e738