Upgrade old design data to use data-id attribute.

[WattyRev]

1. Release React App to production
2. Release API changes to production
3. Run the data upgrade script in JS console from admin site in production

Will not be able to edit old designs until this is done.

Data upgrade script:
https://gist.github.com/WattyRev/c2ff1ff8113fb6d04c00d6595ce4870e

This needs to be applied to production, but it relies on changes to the API. The API also contains changes to the email templates which should not go out until the React app is released. Will have to do this upgrade in production when releasing the React app.