[FIX] website_sale: improve polling at confirmation page

At this step, Order is not always confirmed

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

@@ -16,8 +16,13 @@ $(document).ready(function () {
         return ajax.jsonRpc('/shop/payment/get_status/' + order_id, 'call', {
         }).then(function (result) {
             _poll_nbr += 1;
-            if(result.recall && _poll_nbr <= 5){
-                setTimeout(function () { payment_transaction_poll_status(); }, 1000);
+            if(result.recall) {
+                if (_poll_nbr < 20){
+                    setTimeout(function () { payment_transaction_poll_status(); }, Math.ceil(_poll_nbr / 3) * 1000);
+                }
+                else {
+                    result.message = "<i class='fa fa-warning' />";
+                }
             }
             $('div.oe_website_sale_tx_status').html(result.message);
         });

addons/website_sale/views/templates.xml

@@ -1431,7 +1431,7 @@
                     <t t-call="website_sale.wizard_checkout">
                         <t t-set="step" t-value="50" />
                     </t>
-                    <h1 class="mb32">Order <em t-field="order.name" /> Confirmed</h1>
+                    <h1 class="mb32">Order <em t-field="order.name" /></h1>
                     <div class="row">
                         <div class="col-lg-8 col-sm-9">
                             <div class="thanks_msg">