Make navigation drawer scrollable

![device-2016-11-22-095642](/uploads/bcd5f68d40816ed2e44c3194eb977695/device-2016-11-22-095642.png)![device-2016-11-22-095658](/uploads/da1807e981632936ba04db24dc7b8ae7/device-2016-11-22-095658.png)

Closes #666

See merge request !432