The advanced-service calls weren't using the correct URL prefix based… (#395)

* The advanced-service calls weren't using the correct URL prefix based on the selected coin - they now do.

* advanced-service: simple improvement to the forming of URL prefix.

* Removed a console.log from advanced-service

Breeze.UI/src/app/wallet/advanced/advanced.service.ts

@@ -20,8 +20,7 @@ export class AdvancedService {
     constructor(private httpClient: HttpClient, private globalService: GlobalService, navigationService: NavigationService) { 
         this.walletName = this.globalService.getWalletName();
 
-        navigationService.pageSubject.subscribe(x => 
-            this.urlPrefix = `http://localhost:3722${Page.Bitcoin ? 0 : 1}/api/Wallet/`);
+        navigationService.pageSubject.subscribe(x => this.urlPrefix = `http://localhost:3722${x}/api/Wallet/`);
     }
 
     public getExtPubKey(): Observable<string> {