[*] BO : shipping enlarge listbox carriers

enlarge listbox carriers to see all the name of the carrier

![before](https://f.cloud.github.com/assets/4677244/872870/bb351a0c-f86b-11e2-919c-67b2dd6325fc.png)

![after](https://f.cloud.github.com/assets/4677244/872869/b6375664-f86b-11e2-8552-f6b4db9a668d.png)