Show me those important hidden fields !!!

account_move_usability/account_view.xml

@@ -29,5 +29,16 @@
     </field>
 </record>
 
+<record id="view_move_line_form" model="ir.ui.view">
+    <field name="name">account_move_usability.account_move_line_form</field>
+    <field name="model">account.move.line</field>
+    <field name="inherit_id" ref="account.view_move_line_form"/>
+    <field name="arch" type="xml">
+        <field name="quantity" position="after">
+            <field name="product_id" />
+        </field>
+    </field>
+</record>
+
 </data>
 </openerp>