Added basic support for multiple windows in windows 10

terminus-core/src/services/hostApp.service.ts

@@ -147,6 +147,8 @@ export class HostAppService {
                 this.cliPaste.next(text)
             } else if (op === 'profile') {
                 this.cliOpenProfile.next(argv.profileName)
+            } else if (op === undefined) {
+                this.newWindow();
             } else {
                 this.secondInstance.next()
             }