[FIX] base: Address must stay readonly when field use_parent_address is checked

When you change the country of your company, each field of a company address keeps
its attrs. This is why the company address stays on readonly when use_parent_address
is checked.

Closes #4808
opw: 627033

openerp/addons/base/res/res_partner.py

@@ -67,6 +67,10 @@ class format_address(object):
                 doc = etree.fromstring(arch)
                 for node in doc.xpath("//div[@class='address_format']"):
                     tree = etree.fromstring(v % {'city': _('City'), 'zip': _('ZIP'), 'state': _('State')})
+                    for child in node.xpath("//field"):
+                        if child.attrib.get('modifiers'):
+                            for field in tree.xpath("//field[@name='%s']" % child.attrib.get('name')):
+                                field.attrib['modifiers'] = child.attrib.get('modifiers')
                     node.getparent().replace(node, tree)
                 arch = etree.tostring(doc)
                 break