This change reorganizes and removes unnecessary styling rules used by the website editor. It helps keep the website editing code cleaner and easier to maintain, with no expected visible change for users.

The web interface code now uses the standard event-listener tool provided by the underlying Owl framework instead of Odoo's older custom version. This is an internal cleanup that keeps the codebase aligned with the platform and should not change how users interact with the system.

The hook is now available in owl directly, so the hook has been
removed from odoo's custom hooks. This commit adapts the code using
it.