[IMP] openerp: imp design when render default form view

When a form view had only one field, it was fullwidth.
Now we add a separator automatically. That (seems) have no
effects on model with several field and fix the display when
only one field.

addons/project/project_view.xml

@@ -630,6 +630,7 @@
                 <form string="Tags">
                     <group col="4">
                         <field name="name"/>
+                        <separator/>
                     </group>
                 </form>
             </field>

openerp/models.py

@@ -1449,6 +1449,8 @@ class BaseModel(object):
             etree.SubElement(group, 'field', name=fname)
             if field.type == 'text':
                 etree.SubElement(group, 'newline')
+
+        etree.SubElement(group, 'separator')
         return view
 
     def _get_default_search_view(self, cr, user, context=None):