[IMP] base: Set correct thousand separators for en_us language

Set a thousands separator ',' each 3 characters, and a decimal point '.'

addons/website_event_sale/static/src/js/website.tour.event_sale.js

@@ -83,8 +83,8 @@ base.ready().done(function () {
                 },
             },
             {
-                title:     "Check that the subtotal is 5500.0", 
-                element:   '#order_total_untaxed .oe_currency_value:contains("5500.0")',
+                title:     "Check that the subtotal is 5,500.0", 
+                element:   '#order_total_untaxed .oe_currency_value:contains("5,500.0")',
             },
             {
                 title:     "Select `Wire Transfer` payment method",

openerp/addons/base/base_data.xml

@@ -16,6 +16,9 @@
             <field name="code">en_US</field>
             <field name="name">English</field>
             <field name="translatable">True</field>
+            <field name="grouping">[3,0]</field>
+            <field name="decimal_point">.</field>
+            <field name="thousands_sep">,</field>
         </record>
 
         <function name="install_lang" model="res.lang"/>