[TASK] Contacts: Add name/address sort & contact search (RT-1752)

![out](https://cloud.githubusercontent.com/assets/395821/5513462/81db0cf2-8830-11e4-8b63-259ee020f380.gif)

This will be fixed in @darkdarkdragon's PR https://github.com/ripple/ripple-client/pull/2030