Add an “Archived” tab to the admin page (#158)

[Nicolapps]

Description

This PR adds a switch to the admin panel that allows us to choose between active (which is the current behavior) and archived items.

Closes #158

Type of change

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

How Has This Been Tested?

1. Log in and go to the admin panel
2. Expect to see the non-archived items
3. Click on “Archived”
4. Expect the archived items

Test Configuration:

• Desktop/Mobile: Desktop
• OS: macOS
• Browser: Firefox 104, Safari 15

Checklist:

• [x] My code follows the style guidelines of this project
• [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 (not applicable)
• [x] My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works (not applicable)
• New and existing unit tests pass locally with my changes (not applicable)