Navigation upgrade and reorganization

### Target Customer / Background data / Context / Market Size
- we've blocked navigation updates until we have the UI code unified.
- Feedback from internal and external users is that the navigation is tricky for a few reasons: some capability is lost when moving from minimized to full navigation, some of the language is confusing (clicking data and seeing sources instead of my data for example), and it's hard to find some areas of the app.
### Goals
- based on the existing and future sitemap, update the UI to reflect that vision
### Acceptance Crit
- TBD
### Release Plan
- TBD
### Team
- Anchor / Dev Champion: TBD
- Product Manager: @russorat
- Design: @mnorriswalker