The notification mail template of a SO and an Invoice displays the logo
of the company. However, the logo is always the logo of the superuser's
company.
When accessing the logo from an email client, the UID is not defined.
Therefore, we fall back on the superuser, and display the logo of his
company.
We add the support of a `company` key in the kwargs, so we can force the
company from which we retrieve the logo. Note that this key was used
elsewhere, such as:
addons/web/static/src/js/web_client.js
opw-705420
Nicolas Martinelli
7a03f9ce93