With this commit, the FormRenderer no longer directly extends the WidgetAdapterMixin. It doesn't need to as its parent class (the BasicRenderer) already uses it. Worse, they both called WidgetAdapterMixin.on_attach_callback, and thus mounted was called twice on Components in form views. closes odoo/odoo#55401 X-original-commit: 4c627abd310a131a4828e9ee6be451aeee4708db Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>