In the conversion of the FormViewDialog from legacy to wowl, we forgot the feature allowing to display a "Remove" button in the footer, and to execute a custom callback when this button is clicked. This is used for instance by the Gantt view. This commit restores the feature. closes odoo/odoo#102149 X-original-commit: 3eb126d0297a7e3db0cb98cd1ad9555eefaa0cfa Related: odoo/enterprise#32281 Signed-off-by: Géry Debongnie <ged@odoo.com> Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>