### Links of affected pages in Plone Documentation, if any. - overall nav structure ### Description Could we consider renaming "Frontend" and "Backend" in the navigation? They are confusing misnomers. "Frontend" currently contains docs about Volto, but the Classic UI also has a frontend. I propose that we: - [x] change the title "Frontend" to "Volto UI" - [x] move "Classic UI" so it appears immediately after "Volto UI" "Backend" contains information about developing on Plone-the-framework, which for the most part is relevant to developers working on the Python portion of both Volto sites and Classic UI sites. I propose that we aim to move this content into the new Developer Guide which is started in https://github.com/plone/documentation/pull/1731 @stevepiercy Let me know what you think. If this doesn't seem as obvious to you as it does to me, let's find a time to talk about it.