This commit moves some handler methods from components to models, as a step closer to having most of business code in models. Having business code in models is desirable so that the code is much more maintainable: easier to change and more robust code. Task-2579306 closes odoo/odoo#88878 Related: odoo/enterprise#26277 Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>