title: How to prevent OneSignal on IOS Swift to open WebView when handling notification
body: <p>I'm handling the lunchUrl in my original webview but the problem is when I put 
  <code>kOSSettingsKeyInAppLaunchURL</code> </p>
  
  <p>[<code>true</code>] it opens new webview over my original webview</p>
  
  <p>[<code>false</code>] it opens the link in safary</p>
  
  <pre><code>let notificationOpenedBlock: OSHandleNotificationActionBlock = { result in
      let payload = result?.notification.payload
      if let additionalData = result!.notification.payload!.additionalData {
          // DEEP LINK and open url in RedViewController
          centerViewController.receivedURL = payload!.launchURL as! String!
  
          self.window = UIWindow(frame: UIScreen.main.bounds)
          self.window?.rootViewController = centerViewController
          self.window?.makeKeyAndVisible()
      }
  }
  
  OneSignal.initWithLaunchOptions(launchOptions, appId: "*****", handleNotificationReceived: { (notification) in
      }, handleNotificationAction: notificationOpenedBlock , settings: [kOSSettingsKeyAutoPrompt : true, kOSSettingsKeyInFocusDisplayOption : OSNotificationDisplayType.notification.rawValue, kOSSettingsKeyInAppLaunchURL: true])
  </code></pre>