[FIX] base: Show the full partner form by default

Instead of showing the simplified form view, we should always open the full partner form
by default if nothing is specified.

Coming from: https://github.com/odoo/odoo/commit/f56ad6daf80a15101017dce1145a7ee821d272a3#diff-0e8ff6c715847d514bedc0feb80894deR194

Related to Issue: 1865330

odoo/addons/base/views/res_partner_views.xml

@@ -191,7 +191,7 @@
         <record id="view_partner_form" model="ir.ui.view">
             <field name="name">res.partner.form</field>
             <field name="model">res.partner</field>
-            <field name="priority" eval="18"/>
+            <field name="priority" eval="1"/>
             <field name="arch" type="xml">
                 <form string="Partners">
                 <sheet>