Fix: Login deleting old clients was conflicting with login history

Chore: Moved to angular linting using the recommended plugins / settings

overlord/src/app/cash-flow/cash-flow.service.ts

@@ -36,10 +36,8 @@ export class CashFlowService {
     } else {
       listUrl = url;
     }
-    return <Observable<CashFlow>>(
-      this.http
-        .get<CashFlow>(listUrl, options)
-        .pipe(catchError(this.log.handleError(serviceName, 'list')))
-    );
+    return this.http
+      .get<CashFlow>(listUrl, options)
+      .pipe(catchError(this.log.handleError(serviceName, 'list'))) as Observable<CashFlow>;
   }
 }