Feature/global update last timestamp use stale data while fetching (#473)

* Cache last update timestamp

* Correctly detect update as finished

The update status on server side does not get reset, thus, in case a previous update was finished, it would get detected as finished and handled once on the initial render.

src/lib/requests/RequestManager.ts

@@ -1987,15 +1987,7 @@ export class RequestManager {
     public useGetLastGlobalUpdateTimestamp(
         options?: QueryHookOptions<GetLastUpdateTimestampQuery, GetLastUpdateTimestampQueryVariables>,
     ): AbortableApolloUseQueryResponse<GetLastUpdateTimestampQuery, GetLastUpdateTimestampQueryVariables> {
-        return this.doRequest(
-            GQLMethod.USE_QUERY,
-            GET_LAST_UPDATE_TIMESTAMP,
-            {},
-            {
-                fetchPolicy: 'network-only',
-                ...options,
-            },
-        );
+        return this.doRequest(GQLMethod.USE_QUERY, GET_LAST_UPDATE_TIMESTAMP, {}, options);
     }
 }