Specifically: 'subscript', 'superscript', 'quote', 'strike', and 'numbered list'

This comes form Community contribution, see PR for image of new buttons
https://github.com/ezsystems/PlatformUIBundle/pull/905

QA: Please check if these features work in all cases, as in not just when editing, but publishing, viewing, re-editing and os on
Context: To see if the RichText transformations to docbook in the background work as intended, as the logic for these where added long time ago and not tested against editor before.