Before this fix, user could include accounts in the widget from another company than the object's one when in multi-company mode.
It could cause problems with validation too.
Now we take the company of the object when getting the plans (or the current company if no object's company).
t-3040926
closesodoo/odoo#104150
X-original-commit: 21d754ddafee653d9958443accda2de747caed53
Signed-off-by: Nicolas Viseur (vin) <vin@odoo.com>