mail.activity.form.inherit.calendar mail.activity {'invisible': [('activity_category', '=', 'meeting')]} {'invisible': [('activity_category', '=', 'meeting')]} {'invisible': ['|', ('activity_category', '=', 'meeting'), ('id', '!=', False)]} {'invisible': ['|', ('activity_category', '=', 'meeting'), ('force_next', '=', True)]} {'invisible': [('activity_category', '=', 'meeting')]} {'invisible': [('activity_category', '=', 'meeting')]}