Convert remaining components to functional components

[m4theushw]

What does it do?

• Pulls all commits from develop and applies into hooks branch.
• Converts all class components to functional components.
• Fixes tests to work with hooks.

Checklist:

• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] Updated documentation (if applicable)
• [x] Added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] My changes generate no new warnings

[coveralls]

Pull Request Test Coverage Report for Build 1533

• 164 of 167 (98.2%) changed or added relevant lines in 7 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.5%) to 94.541%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/tree/index.js	29	32	90.63%
<!--	Total:	164	167

Totals
Change from base Build 1507:	0.5%
Covered Lines:	669
Relevant Lines:	688

---

💛 - Coveralls

[mrchief]

This is awesome work @m4theushw !! Thanks for sending this. I'm gonna go over it this weekend and having the long weekend helps.

This is the first step towards having headless components and I'm glad we're heading in that direction.

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 10 days if no further activity occurs. Thank you for your contributions.