Enhancements to the sponsorship GUI

fixes  #128

frontend/src/app/services/api.service.ts

@@ -73,4 +73,8 @@ export class ApiService {
   getDonation$(): Observable<any[]> {
     return this.httpClient.get<any[]>(this.apiBaseUrl + '/donations');
   }
+
+  getDonationRemote$(): Observable<any[]> {
+    return this.httpClient.get<any[]>('http://mempool.space/api/v1/donations');
+  }
 }