Fix duplicated ids

The id `right-label` is duplicate, and colides with doc/includes/form/examples_form_inline_labels.html. To replicate the issue just click in the `label.right.inline` in http://foundation.zurb.com/docs/components/forms.html
Merge pull request #4256 from kuroisuna/patch-1

Fix duplicated ids in label.inline.right example
Merge branch 'master' of https://github.com/zurb/foundation