Remove another couple of sync invokes
Remove another couple of sync invokes

OnRefreshStarting and OnInitialSyncComplete don't need to
be called synchronously, as they don't do anything that
would require the sync thread to pause.

mwerle/EDDiscovery,jthorpe4/EDDiscovery,mwerle/EDDiscovery,jgoode/EDDiscovery,jgoode/EDDiscovery