Cleanup spacing of tag fields
Cleanup spacing of tag fields

* Use a smaller grid width to match earlier form fields
* Nest each item in a form-group for vertical spacing
* Re-word the section explanation

leftees/publisher,leftees/publisher,leftees/publisher,alphagov/publisher,telekomatrix/publisher,telekomatrix/publisher,telekomatrix/publisher,alphagov/publisher,leftees/publisher,alphagov/publisher,telekomatrix/publisher