Currently, when inline domain selector is inside the modal dialog
then the domain selector popover hide inside the modal body due to
auto scroll on modal body. domain selector in dialog is rare case and
here there is less content inside the coupon dialog due to that we can
use the overflow visible for this specific wizard(modal dialog).
So in this commit, fix the issues by adding overflow property in the
modal body due to that, it will always display on top of the modal.
closesodoo/odoo#59594
Taskid: 2225272
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>