JS import optimizations

[clpetersonucf]

• Adds a new optimization section to the dev and prod webpack configs. Common JS dependencies are bundled into a new commons.js file.
• Adds commons.js to the package.json manifest for the materia-widget-dependencies package.
• Updates the JS FuelPHP config to remove hard-coded react development dependencies and replaces them with the commons.js file.

[FrenjaminBanklin]

I haven't stumbled across anything breaking after checking functionality throughout the app. Better load times will be nice.