Simplified measurement insertion

Simplifies the data entry UX by creating dedicated UI for each element, removing the wizards.

** DO NOT MERGE until this list is done **

- [x] visualization views
- [ ] update context menus (use the same action as for the simplified flow)
- [ ] browser `+`
- [ ] Source assignment in `Measurements`
- [ ] select added entities
- [ ] disclose to show added files