[IMP]Website Blog: Make Onboarding tour user friendly and change customi...

...ze cover feature

- Task: https://www.odoo.com/web?debug=#id=8996&view_type=form&model=project.task&menu_id=3942&action=327
- Pad: https://pad.odoo.com/p/r.MnhQk73bZbMtu2Mv
This should not be a field; it has nothing to do with the model itself. If you can't handle it from the JS, maybe handle it from a controller that will create the various desired values