Do not initialise Idle twice (#583)

When reloading the page, initIdle() is called twice, which causes two onTimeout subscription.
This causes problems when loading the KC logout page, because the id_token_hint parameter isn't passed.

src/app/core/auth/auth.service.ts

@@ -118,7 +118,7 @@ export class AuthService {
         .toPromise()
         .finally(() => {
           if (!this.idle.isIdling()) {
-            this.initIdle()
+            this.resetIdle()
           }
         })
     }