Override in enterprise web_studio of _saveView on error never rejected promises. But now it does so the XML editor interface is not blocked after error. But we were already showing the correct error in web_studio use case, so we don't want another one and this change allow that by only showing an error if we received rejection value. opw-2460081 closes odoo/odoo#68569 X-original-commit: 43184af875f3eb52586348b383627cb0140484f5 Related: odoo/enterprise#17395 Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>