With the latest version of storybook, our documentation were broken as
we were trying to access to a property from an object that does not
exist anymore. In fact, in the preview context, a property `globals`
has been renamed `userGlobals`.
We want to be able to visualize easily themes directly inside
Storybook. This was not a trivial task as there is no centralized
logic to handle Doc / Stories / Manager at the same time.
