Use reportdata.timestamp for last seen column
Use reportdata.timestamp for last seen column

Fix for #334

childrss/munkireport-php,munkireport/munkireport-php,poundbangbash/munkireport-php,n8felton/munkireport-php,munkireport/munkireport-php,poundbangbash/munkireport-php,n8felton/munkireport-php,gmarnin/munkireport-php,n8felton/munkireport-php,gmarnin/munkireport-php,childrss/munkireport-php,munkireport/munkireport-php,childrss/munkireport-php,poundbangbash/munkireport-php,n8felton/munkireport-php,childrss/munkireport-php,munkireport/munkireport-php,gmarnin/munkireport-php,poundbangbash/munkireport-php,childrss/munkireport-php,n8felton/munkireport-php,munkireport/munkireport-php,childrss/munkireport-php,gmarnin/munkireport-php,n8felton/munkireport-php,gmarnin/munkireport-php,poundbangbash/munkireport-php