improved displaying of dates.

interface/lib/classes/listform.inc.php

interface/lib/lang/bg.lng

interface/lib/lang/de.lng

interface/lib/lang/en.lng

interface/lib/lang/es.lng

interface/lib/lang/fi.lng

interface/lib/lang/fr.lng

interface/lib/lang/it.lng

interface/lib/lang/nl.lng

interface/lib/lang/ru.lng

interface/lib/lang/se.lng

interface/web/monitor/list/datalog.list.php

interface/web/monitor/list/log.list.php