Responsive mempool blocks.

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

@@ -1,6 +1,6 @@
 import { Injectable } from '@angular/core';
 import { webSocket, WebSocketSubject } from 'rxjs/webSocket';
-import { WebsocketResponse } from '../interfaces/websocket.interface';
+import { WebsocketResponse, MempoolBlock } from '../interfaces/websocket.interface';
 import { StateService } from './state.service';
 import { Block, Transaction } from '../interfaces/electrs.interface';
 import { Subscription } from 'rxjs';