Ionic version: (check one with "x")
[ ] 1.x
[x] 2.x

I'm submitting a ... (check one with "x")
[x] bug report
[ ] feature request
[ ] support request => Please do not submit support requests here, use one of these channels: https://forum.ionicframework.com/ or http://ionicworldwide.herokuapp.com/

Current behavior:
When having a ion-content with fullscreen, and an ion-refresher the refresher is hidden behind the header

Expected behavior:
The refresher must always appear just below the header

Steps to reproduce:

• Use this demo: https://github.com/driftyco/ionic/tree/dbfc183cac036099603f9e51611bfccbc900a08b/demos/src/refresher
• Add fullscreen to ion-content

Related code:

<ion-content fullscreen>
    <ion-refresher (ionRefresh)="refreshList($event)">
        <ion-refresher-content></ion-refresher-content>
    </ion-refresher>
</ion-content>

Other information:
Motivation:
Having a list you can pull down to refresh, or pull up and hides the header

Ionic info: (run ionic info from a terminal/cmd prompt and paste output below):

 ordova CLI: 6.4.0
Ionic Framework Version: 2.0.1
Ionic CLI Version: 2.2.1
Ionic App Lib Version: 2.2.0
Ionic App Scripts Version: 1.0.0
ios-deploy version: Not installed
ios-sim version: Not installed
OS: Windows 10
Node Version: v6.9.1
Xcode version: Not installed