Restore the stateFromProps() method that was accidentally removed from src/components/graph-settings.jsx
Restore the stateFromProps() method that was accidentally removed from src/components/graph-settings.jsx

Reviewers: scottgrant

Subscribers: tom, jared

Differential Revision: https://phabricator.khanacademy.org/D37174

ariabuckles/perseus,learningequality/perseus,ariabuckles/perseus,learningequality/perseus,ariabuckles/perseus,ariabuckles/perseus