Add module purchase_stock_usability

Port purchase_usability to v12

purchase_stock_usability/stock_view.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2017-2019 Akretion (http://www.akretion.com/)
+  @author: Alexis de Lattre <alexis.delattre@akretion.com>
+  License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+-->
+
+<odoo>
+
+<record id="view_picking_form" model="ir.ui.view">
+    <field name="name">purchase_usability.stock.picking.form</field>
+    <field name="model">stock.picking</field>
+    <field name="inherit_id" ref="stock.view_picking_form"/>
+    <field name="arch" type="xml">
+        <field name="origin" position="after">
+            <field name="purchase_id" attrs="{'invisible': [('picking_type_code', '!=', 'incoming')]}"/>
+        </field>
+    </field>
+</record>
+
+
+</odoo>