fix for #2754
corrected behaviour when adding / saving new authorites
CdmAuthorityEditor : Editor for updating Cdm authorities CdmAuthorityEditorInput : Input for the CdmAuthorityEditor EditCdmAuthoritiesHandler : Handler to open CdmAuthorityEditor EditorUtil : added method to open CdmAuthorityEditor plugin.xml : added extensions to the BulkEditor menu to open the CdmAuthorityEditor checking if the selected object is Group