[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
Just checking ... has_image has no utility anymore (was used for some issues in the kanban view in 2012). So I would say 
 - remove has_image field in base/res/res_partner.py, update the res_partner_view file (like <t t-if="!record.image or record.image.raw_value === false"> + adding the field image in the field list of the nested kanban view)
 - here just check that image is not False