Fix missing redirect after login (#1592)

Each unauthorized error was caught by the token expired handler, which has reset the whole query state and this leads sometimes to a missing redirect after login.

scm-ui/ui-api/src/errors.ts

@@ -72,14 +72,18 @@ export class BackendError extends Error {
 
 export class UnauthorizedError extends Error {
   statusCode: number;
+
   constructor(message: string, statusCode: number) {
     super(message);
     this.statusCode = statusCode;
   }
 }
 
+export class TokenExpiredError extends UnauthorizedError {}
+
 export class ForbiddenError extends Error {
   statusCode: number;
+
   constructor(message: string, statusCode: number) {
     super(message);
     this.statusCode = statusCode;