Make CheckSystems cancellable and report progress
Make CheckSystems cancellable and report progress

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