Add spinner elsewhere

[gmrabian]

Summary

Add spinner to other pages for consistency and good UX

• Add spinner to details, application, and confirmation pages
• Small logic updates for cleanliness and consistency

Fixes #150 more

Type of change

• [x] New feature (non-breaking change which adds functionality)

How To Test

• Click around the various pages
• Verify spinners show up on load
• Try modifying the id in the url and make sure it shows NotFound on details and application pages

Checklist:

• [x] My code follows the style guidelines of this project and has no linting errors
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation, including any applicable ADRs
• [x] My changes generate no new warnings
• [ ] I have added tests that fail without these changes
• [x] New and existing tests (unit, integration, accessibility) pass locally
• [ ] Documentation updated
• [ ] If there are security concerns they are addressed or ticketed after being discussed

[codeclimate[bot]]

Code Climate has analyzed commit e1f76a8f and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (80% is the threshold).

This pull request will bring the total coverage in the repository to 87.9%.

View more on Code Climate.