Response viewlet: add permissionCheck for edit and delete actions.

![bildschirmfoto 2014-08-28 um 18 48 56](https://cloud.githubusercontent.com/assets/485755/4079257/412b22d4-2ed3-11e4-893f-e9d5d4d51db3.png)

The `Edit` and `Delete` action should only be displayed, when the user has the permission to edit/delete. 

@deiferni