chore(routing): Switch to new react-router syntax

[bmulholland]

This is step #2 of upgrading to React Router v6. https://reactrouter.com/en/main/upgrading/v5#upgrade-to-react-router-v51

As reference, I looked at
https://reacttraining.com/blog/react-router-v5-1 and https://gist.github.com/mjackson/d54b40a094277b7afdd6b81f51a0393f

[bmulholland]

Current dependencies on/for this PR:

• main
  • PR chore(routing): Switch to new react-router syntax #638 👈
    • PR fix(deps): update react-router monorepo to v6 (major) #635

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[bmulholland]

Note that I deviated from https://gist.github.com/mjackson/d54b40a094277b7afdd6b81f51a0393f#get-started-upgrading-today in the PrivateRoute refactor, because https://reactrouter.com/en/main/upgrading/v5#upgrade-to-react-router-v51 says to remove , which that suggested. I think that will work okay but I don't have a good way to test this -- how can you manually go to a route in Electron? If you have a way to test the redirect works okay, and the from passes through properly, that would be good to double-check. Low-risk, though, this should be rarely (if ever) hit.

[afonsojramos]

All you need to do is just to drop in a Link component to a certain route and you can see it in action. Tested locally and it seemed to work!