E.g. to accommodate the how we need control over how react and react-dom are loaded.

tfennelly assigning to you for now but I intend to reach out tomorrow so we can work this together. We discussed a workaround for this last week but I was not successful after following the steps you'd provided. Could be something I've missed though. If it's not, let's try to fix together, with my final task being to do a write-up in a wiki about the steps needed to work around this problem.

Steps followed:

1. Add 'react-addons-css-transition-group' to init.jsx in blueocean-web
2. In js-extensions/@jenkins-cd/subs/extensions-bundle.js, update the createBundle function near the end
3. Build a new js-extensions
4. npm install new js-extensions in blueocean-web and blueocean-personalization
5. Re-run gulp bundle for both modules