Add expand on tree view

and unify layout of form view.

issue8644
review262131002

view/ec_sales_list.xml

@@ -3,7 +3,7 @@
 this repository contains the full copyright notices and license terms. -->
 <tree>
     <field name="company_tax_identifier" tree_invisible="1"/>
-    <field name="party_tax_identifier"/>
+    <field name="party_tax_identifier" expand="1"/>
     <field name="code"/>
     <field name="amount"/>
     <field name="currency"/>