Spy panel should show index pattern name instead of GUID


**Kibana version**: 6.0.0 beta1

**Browser version**: IE 11

**Description of the problem including expected versus actual behavior**:
In the "Statistics" tab of the Spy Panel, it shows the index pattern ID instead of the index pattern name.
![spy_panel](https://user-images.githubusercontent.com/5196019/28824555-3106e562-76cb-11e7-9b84-d0eef8a8747d.png)
