Icon for MediathekView. Fixes #1035

Icon for MediathekView, issue #1035

The pushed icon:
![mediathekview3](https://cloud.githubusercontent.com/assets/7050624/5459952/0f052b1e-855f-11e4-9c25-fba0a0c79ffd.png)


Option:
![mediathekview](https://cloud.githubusercontent.com/assets/7050624/5459324/5cefe8c8-855a-11e4-99a3-92a8fbd77f3e.png)