A more adaptative layout for the chat window

Default

![capture decran 2013-07-17 a 16 17 35](https://f.cloud.github.com/assets/41547/812725/adada1b8-eef4-11e2-815e-ced7f04ac439.png)

Popped up (medium sized)

![capture decran 2013-07-17 a 16 18 31](https://f.cloud.github.com/assets/41547/812726/b1675948-eef4-11e2-95c4-0fe04f9671f9.png)


Popped up (larger)

![capture decran 2013-07-17 a 16 18 49](https://f.cloud.github.com/assets/41547/812733/b786dc90-eef4-11e2-8011-a00959c1be9d.png)

Full screen (13" mba)

![capture decran 2013-07-17 a 16 19 55](https://f.cloud.github.com/assets/41547/812735/bcec386a-eef4-11e2-8ad1-f7ef9a37f314.png)