Re-introduce after discussion with AL the function that allow to specify
a custom placeholder for a specific model.
It has been removed because no more used since we use avatar mixin for
res.users and res.company. But it doesn't means that each model should add
his own mixin and controller and ... Keep it simple!
Use it for product and product template to have a default placeholder more
representative of the model.
Courtesy of xlu-odoo for this design
opw-2513801
closesodoo/odoo#73576
Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>
Jeremy Kersten
4d3b29c7b7