trial of converting class-based React components to functions

[R-Stev]

Description

Progress for #1543
I appear to be unable to run the python backend on linux to confirm everything still works correctly, so this updates only one of the relevant *.jsx for now.

Checklist

• Updated HISTORY.rst and link to any relevant issue (if these changes are user-facing)
• Updated the user's guide (if needed)
• Tested the Workbench UI (if relevant)

[R-Stev]

I noticed that I am still able to run yarn test-renderer which shows that it wasn't quite correct, so aborting.

[R-Stev]

workbench/src/renderer/components/DataDownloadModal/index.jsx
workbench/src/renderer/components/HomeTab/index.jsx
workbench/src/renderer/components/LogTab/index.jsx
workbench/src/renderer/components/OpenButton/index.jsx
workbench/src/renderer/components/Portal/index.jsx
workbench/src/renderer/components/SaveAsModal/index.jsx
workbench/src/renderer/components/SettingsModal/index.jsx
workbench/src/renderer/components/SetupTab/ArgsForm/index.jsx

Converted to functional components, and passes yarn test-renderer. Included in this pull request.

workbench/src/renderer/components/ErrorBoundary/index.jsx

Currently no way to write an error boundary as a function component, leave unchanged or look at https://github.com/bvaughn/react-error-boundary ? (see note in https://react.dev/reference/react/Component#catching-rendering-errors-with-an-error-boundary)

workbench/src/renderer/app.jsx
workbench/src/renderer/components/InvestTab/index.jsx
workbench/src/renderer/components/SetupTab/index.js

I was unable to get these to the point of passing all tests. Not included.

[dcdenu4]

Hey @R-Stev, thanks for jumping in and taking a stab at this. We are currently in the process of putting together contribution guidelines for our project and working through some legalese with Stanford University to make sure we can accept non trivial contributions. So we might sit on this for a bit until we learn more! We are really excited to be able to take contributions from the open source community, so thank you!