73014: Create patch from object-updates and send immediate patch for item-metadata-edit

src/app/core/data/update-data.service.ts

@@ -1,11 +1,14 @@
 import { Observable } from 'rxjs/internal/Observable';
 import { RemoteData } from './remote-data';
 import { RestRequestMethod } from './rest-request-method';
+import { Operation } from 'fast-json-patch';
+import { RestResponse } from '../cache/response.models';
 
 /**
  * Represents a data service to update a given object
  */
 export interface UpdateDataService<T> {
+  patch(dso: T, operations: Operation[]): Observable<RestResponse>;
   update(object: T): Observable<RemoteData<T>>;
   commitUpdates(method?: RestRequestMethod);
 }