Since commit [1] removed `legacyRejectPromiseHandler()`, trying to edit a link leading to an HTTP error triggers an "Uncaught Promise" error. This commit makes sure such links do not cause a traceback: the link popover is just less detailed (no title, favicon). [1]: https://github.com/odoo/odoo/commit/fcb16a3b1bd373726ffb54f0fbe41fb6d1784769 task-3584686 closes odoo/odoo#141225 Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>