Drain message queue on typing indicator click

src/app/messages/messages.component.ts

@@ -59,4 +59,10 @@ export class MessagesComponent implements OnInit {
   convertMarkdownToHTML(text: string) {
     return this.markdownService.convertToHtml(text);
   }
+
+  drainMessageQueue() {
+    this.websocketService.send({
+      'key': 'message.queue.drain'
+    });
+  }
 }