This commit simply enables a custom prop for the Dialog component so that it can have a hand-picked background instead of the default 'white'. Will notably be useful for the social images carousel where we need a dark background. Task-2855647 closes odoo/odoo#101505 X-original-commit: 8da44acadbd4ad4c03dba496daf317f1f2ab8371 Related: odoo/enterprise#31973 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com> Signed-off-by: Warnon Aurélien (awa) <awa@odoo.com>