Friendlier new conversation mobile

# Before
![Pantallazo-6](https://f.cloud.github.com/assets/1108789/163499/9f8a9904-7840-11e2-9c70-0c218aeec80c.png)

# After

![Pantallazo-4](https://f.cloud.github.com/assets/1108789/163496/339c53fa-783f-11e2-852c-c6d335e65722.png)