- datalog history view and restore added missing files

interface/lib/classes/finediff.inc.php

interface/web/monitor/dataloghistory_list.php

interface/web/monitor/dataloghistory_undo.php

interface/web/monitor/dataloghistory_view.php

interface/web/monitor/lib/lang/de_dataloghistory_list.lng

interface/web/monitor/lib/lang/de_dataloghistory_undo.lng

interface/web/monitor/lib/lang/de_dataloghistory_view.lng

interface/web/monitor/lib/lang/en_dataloghistory_list.lng

interface/web/monitor/lib/lang/en_dataloghistory_undo.lng

interface/web/monitor/lib/lang/en_dataloghistory_view.lng

interface/web/monitor/list/dataloghistory.list.php

interface/web/monitor/templates/dataloghistory_list.htm

interface/web/monitor/templates/dataloghistory_undo.htm

interface/web/monitor/templates/dataloghistory_view.htm