[FIX] website_sale: format amount according to currency client side

This commit closes #1103, closes #11553

addons/web/static/src/js/framework/translation.js

@@ -29,9 +29,7 @@ var TranslationDataBase = Class.extend(/** @lends instance.TranslationDataBase#
         });
         if (translation_bundle.lang_parameters) {
             this.parameters = translation_bundle.lang_parameters;
-            if (typeof(py) !== "undefined") {
-                this.parameters.grouping = py.eval(this.parameters.grouping);
-            }
+            this.parameters.grouping = JSON.parse(this.parameters.grouping);
         }
     },
     add_module_translation: function(mod) {

addons/website_sale/static/src/js/website_sale.js

@@ -53,6 +53,7 @@ odoo.define('website_sale.website_sale', function (require) {
 
 var ajax = require('web.ajax');
 var core = require('web.core');
+var utils = require('web.utils');
 var _t = core._t;
 var base = require('web_editor.base');
 
@@ -250,9 +251,15 @@ $('.oe_website_sale').each(function () {
     });
 
     function price_to_str(price) {
-        price = Math.round(price * 100) / 100;
-        var dec = Math.round((price % 1) * 100);
-        return price + (dec ? '' : '.0') + (dec%10 ? '' : '0');
+        var l10n = _t.database.parameters;
+        var precision = 2;
+
+        if ($(".decimal_precision").length) {
+            precision = parseInt($(".decimal_precision").first().data('precision'));
+        }
+        var formatted = _.str.sprintf('%.' + precision + 'f', price).split('.');
+        formatted[0] = utils.insert_thousand_seps(formatted[0]);
+        return formatted.join(l10n.decimal_point);
     }
 
     $(oe_website_sale).on('change', 'input.js_product_change', function () {

addons/website_sale/views/templates.xml

@@ -434,7 +434,7 @@
           <span itemprop="price" style="display:none;" t-esc="product.price"/>
           <span itemprop="priceCurrency" style="display:none;" t-esc="website.currency_id.name"/>
       </h4>
-      <h4 class="css_non_editable_mode_hidden">
+      <h4 class="css_non_editable_mode_hidden decimal_precision" t-att-data-precision="product.currency_id.decimal_places">
         <span t-field="product.lst_price"
             t-field-options='{
                "widget": "monetary",