Replacing an image in the website editor now preserves the image's existing styling classes. This prevents layouts or visual formatting from changing unexpectedly when users update images.

Replacing an image in the web editor didn't preserve its classes. Now it does.

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

This update fixes problems with how certain pages and customization views are handled after a technical view format change. It helps keep project overview screens and Studio customizations working reliably for users.

cf odoo/odoo#28716