plugin/theme-breaking changes:
1. `controller:create-account` is gone (use `component:modal/create-account` in modifyClass, **if** absolutely necessary)
2. `create-account-body` css class is gone (target `.d-modal.create-account` or any of the inner classes: `.modal-outer-container`, `.modal-middle-container`, `.modal-inner-container`, or `.modal-body`)