title: Ionic 3 Local Notification pushes into a specific page too many times
body: <p>I'm new on Ionic and I may have miss some important detail developing a simple app that should show a specific page trough opening a Local Notification. The issue is:I have made a button that generate a Local notification by clicking on it. If I generate the notification for the first time and then I click on it, it works like a charm, but when I generate the second notification if I click on it the app pushes the new page two times, the third time it pushes three times an so on, even if I go back to the root page through the navigation bar.</p>
  
  <p>Someone can help me understand what I'm doing wrong? 
  Thank you so much</p>
  
  <p>This is the code for the root page</p>
  
  <pre><code>import { Component } from '@angular/core';
  import { NavController } from 'ionic-angular';
  import { LocalNotifications } from '@ionic-native/local-notifications';
  import { Platform } from 'ionic-angular';
  import { Page2Page } from '../page2/page2';
  
  
  @Component({
    selector: 'page-home',
    templateUrl: 'home.html'
  })
  export class HomePage {
  
  
    constructor(public navCtrl: NavController, private localNotifications: LocalNotifications, public platform: Platform) {
  
    }
  
    click(){
  
        this.platform.ready().then(()=&gt;{
  
          this.localNotifications.schedule({
            id: 1 ,
            title: 'Notifica',
            text: 'Single ILocalNotification',
  
          })
  
          this.localNotifications.on('click').subscribe(()=&gt;{
  
            console.log("Notification Subscribed")
            this.navCtrl.push(Page2Page);
  
          })
        })
    }
  
  }
  </code></pre>
  
  <p>And this is the second page (it literally does nothing)</p>
  
  <pre><code>import { Component } from '@angular/core';
  import { IonicPage, NavController, NavParams } from 'ionic-angular';
  
  /**
   * Generated class for the Page2Page page.
   *
   * See https://ionicframework.com/docs/components/#navigation for more info on
   * Ionic pages and navigation.
   */
  
  @IonicPage()
  @Component({
    selector: 'page-page2',
    templateUrl: 'page2.html',
  })
  export class Page2Page {
  
    constructor(public navCtrl: NavController, public navParams: NavParams) {
    }
  
    ionViewDidLoad() {
      console.log('ionViewDidLoad Page2Page');
    }
  }
  </code></pre>