Step 12.5: Added stub for messages attachment menu

src/pages/messages/messages-attachments.ts

@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+import { ModalController, ViewController } from 'ionic-angular';
+
+@Component({
+  selector: 'messages-attachments',
+  templateUrl: 'messages-attachments.html'
+})
+export class MessagesAttachmentsComponent {
+  constructor(
+    private viewCtrl: ViewController,
+    private modelCtrl: ModalController
+  ) {}
+}