[IMP] base: order companies in Company Switcher

Add a sequence field on the res_company. The companies are ordered
by sequence (by default 10), than by name. That way, we can order the
companies on the company switcher for example, and have the most common
companies first.

openerp/addons/base/res/res_company.py

@@ -11,7 +11,7 @@ from odoo.exceptions import ValidationError
 class Company(models.Model):
     _name = "res.company"
     _description = 'Companies'
-    _order = 'name'
+    _order = 'sequence, name'
 
     _header = """
 <header>
@@ -152,6 +152,7 @@ class Company(models.Model):
     vat = fields.Char(related='partner_id.vat', string="Tax ID")
     company_registry = fields.Char()
     rml_paper_format = fields.Selection([('a4', 'A4'), ('us_letter', 'US Letter')], string="Paper Format", required=True, default='a4', oldname='paper_format')
+    sequence = fields.Integer(help='Used to order Companies in the company switcher', default=10)
 
     _sql_constraints = [
         ('name_uniq', 'unique (name)', 'The company name must be unique !')

openerp/addons/base/res/res_company_view.xml

@@ -44,6 +44,7 @@
                                     <field name="company_registry"/>
                                     <field name="currency_id" options="{'no_create': True}" id="company_currency"/>
                                     <field name="parent_id"  groups="base.group_multi_company"/>
+                                    <field name="sequence" invisible="1"/>
                                 </group>
                             </group>
                         </page>
@@ -88,6 +89,7 @@
             <field name="field_parent">child_ids</field>
             <field name="arch" type="xml">
                 <tree string="Companies">
+                    <field name="sequence" widget="handle"/>
                     <field name="name"/>
                     <field name="partner_id"/>
                 </tree>