This commit adapts the x2many as first notebook tab's child selector to the DOM of its OWL implementation, restoring the correct padding in this case. Steps to reproduce: - Open Product form view - Select the Variants notebook's tab - Tab shouldn't have padding when the first child is a one2many closes odoo/odoo#100912 X-original-commit: 74875dcc0b84236c0911b117666fc6deb41ed432 Signed-off-by: Adrien Dieudonné (adr) <adr@odoo.com> Signed-off-by: Pierre Paridans (app) <app@odoo.com>