complete the fix for #18

Since the navigator was widen in https://github.com/ibm-js/jsdoc-amddcl/commit/c41845d14b38cf754724483216c36ecb909d6c19, the section needs to be shrinked.

This solves the overlaping between section and navigator in http://ibm-js.github.io/deliteful/docs/api/0.4.0/deliteful/ComboBox.html for example.