refactor(frontend): Clean up warnings in StrictMode

[frol]

Story

The warnings are potential bugs, so we should resolve them whenever possible.

Enabling StrictMode in next.config.js reveals that:

• [ ] FlipMove and InfiniteScroll use UNSAFE_componentWillReceiveProps: Using UNSAFE_componentWillReceiveProps in strict mode is not recommended and may indicate bugs in your code.
• [ ] FlipMove: findDOMNode is deprecated in StrictMode. findDOMNode was passed an instance of _default which is inside StrictMode. Instead, add a ref directly to the element you want to reference. Learn more about using refs safely here: https://fb.me/react-strict-mode-find-node

NOTE: We may want to try https://github.com/CassetteRocks/react-infinite-scroller instead of react-infinite-scroll-component

Acceptance Criteria

• [ ] All the warnings are resolved
• [ ] Pagination (infinite scrolling) works
• [ ] Animations (flip move) work