Clean up files

[K-Ho]

Make lint pass with no warnings.

[K-Ho]

Going to need to replace componentWillReceiveProps with componentDidUpdate
EDIT: look into the getDerivedStateFromProps(props, state) lifecycle method.... or not..

[K-Ho]

https://github.com/airbnb/javascript/tree/master/react

[K-Ho]

At times, props are passed many times down through components ("prop drilling"). We can fix this by either passing components as props by using the slot pattern or using the React’s Context API which can be used to pass props implicitly down to component tree.

[K-Ho]

Going to need to replace componentWillReceiveProps with componentDidUpdate
EDIT: look into the getDerivedStateFromProps(props, state) lifecycle method.... or not..

"it is a bad idea to unconditionally copy props to state." (Source)