- Remove the sidebar duplicate JS that would also add a ready class but NOT after a settimeout, only after the component renders
- This means we now have one location in the code that does this, driven by Stimulus
- Update the Storybook preview JS so that we can rely on similar behaviour in Storybook for transitions
- Accessing constructor was confusing and createController is not a core requirement
- Avoid modifying the base Stimulus application class
- Expose `window.StimulusModule` as the module output
- Expose `window.wagtail.app` as the Wagtail Stimulus application instance
- Rename root element variable to `root` in initStimulus (so we do not conflict with potential action option registration that uses `element` variable names)
- Pull in the wagtail.components to the same core.js file and add JSDoc for exposed global
- Relates to #10197
- default / named exports are used in varying places and it is not a critical blocker for future code
- disable this rule and in the future it can be re-assessed or moved to the core wagtail eslint config
