[WebRender] Fix WebRender, Enable HTML5 settings

- Fix WebRender to use non-Dark (black) background by default.
- Enable HTML5 settings.


![temp](https://cloud.githubusercontent.com/assets/1189414/3138058/6810aabc-e86b-11e3-8ab9-827b67a439a1.jpg)


Branch:  fix/webrender