Before this commit the layout of the off-canvas menu was broken with an affixed header. task-2312878 closes odoo/odoo#57442 closes odoo/odoo#58528 X-original-commit: 6e1c2ad5db69fe7eaa8f53c8da8375435b59f486 Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>