EasyPost shipment requests now include an Odoo reference so EasyPost can identify and track Odoo-related customers more easily. This is a small backend improvement that supports better partner visibility without changing the user workflow.

**Task**: https://www.odoo.com/web#id=1963111&model=project.task&menu_id=4720
**Pad**: https://pad.odoo.com/p/r.a45c918a59774685fb203a1965a8a40f

--

This change updates the web module to use Odoo's shared content caching setting for menu loading instead of a separate hardcoded value. It keeps caching behavior more consistent across the platform and reduces future maintenance risk, with no expected visible change for users.

use CONTENT_MAXAGE to define the max-age instead




--
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

This change avoids cleaning up the same interface component children twice when a component is closed or removed. It reduces unnecessary background work and slightly improves performance without changing user-facing behavior.

This commit prevent from going through the widget's children twice when `destroy()` is called :
* once in `ParentedMixin`
* once in `Widget`