Add expand on tree view

and unify layout of form view.

issue8644
review262131002

view/dpd_credential_list.xml

@@ -2,7 +2,7 @@
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
 <tree>
-    <field name="company"/>
-    <field name="user_id"/>
+    <field name="company" expand="1"/>
+    <field name="user_id" expand="2"/>
     <field name="server"/>
 </tree>