v2.2.10: Refactors form structure handling

Replaces the `StructureTrait` with `ElementsTrait` to streamline how form elements are accessed and rendered.

This change simplifies the logic in templates and components by providing a more direct way to iterate over form elements, improving maintainability and reducing code duplication. The new `ElementsTrait` consolidates the logic for filtering and ordering elements, making it easier to manage the form structure.