Only update EDSMLastSystems during a full sync
Only update EDSMLastSystems during a full sync

jgoode/EDDiscovery,vendolis/EDDiscovery,jeoffman/EDDiscovery,jgoode/EDDiscovery,mwerle/EDDiscovery,jthorpe4/EDDiscovery,mwerle/EDDiscovery,vendolis/EDDiscovery,jeoffman/EDDiscovery