Updates to "Navigation" (#1029)

* move blueprint metaphor to settings

* update pages section

* update groups section

* update tabs

* add missing { } for code samples

* fix JSON snytax

* remove line breaks

* update menus

* update placeholder labels

* update anchors

* update `global` anchors

* update dropdowns

* update versions and languages

* update breadcrumbs

* consistent casing in code samples

* copyedits

Author: ethanpalm