I have defined a server action in an xml file and attached it to a menu button. Everything works, I get redirected to the record in question and the record is displayed in edit mode. If I use target = current,new,inline I see exactly what I expect. 

I can even edit the fields!

HOWEVER....

There is NO save button.

<record id="action_settings" model="ir.actions.server">
            <field name="name">Contact Settings</field>
            <field name="model_id" ref="model_res_partner"/>
            <field name="code">
action = {
    "type": "ir.actions.act_window",
    "view_mode": "form",
    "res_model": "res.partner",
    "target": "inline",
    "res_id": user.commercial_partner_id.id,
}
            </field>
        </record>