Fix course edit page at @media (min-width: @screen-md-min) { on a 1024 wide display.

Gives:

![2014-03-24 16_09_15-edit course settings](https://f.cloud.github.com/assets/1058419/2501677/cbf80f3e-b36e-11e3-803f-5353ae604f1e.png)