ledger: modify the text on the place order button

ledger/templates/checkout/preview.html

@@ -130,6 +130,31 @@ <h2>{% trans 'Totals' %}</h2>
 
 {% endblock %}
 
+{% block place_order %}
+    <form method="post" action="{% url 'checkout:preview' %}" id="place_order_form">
+        {% csrf_token %}
+        <input type="hidden" name="action" value="place_order" />
+
+        {% comment %}
+            When submitting sensitive data on the payment details page (eg a bankcard)
+            we don't want to save the data and so we pass the bound form to the preview
+            template and render it in a hidden div.  Then the payment information will
+            get re-submitted when the user confirms the order.
+        {% endcomment %}
+        <div style="display:none">
+            {% block hiddenforms %}{% endblock %}
+        </div>
+
+        <div class="form-group clearfix">
+            <div class="row">
+                <div class="col-sm-3 col-sm-offset-9">
+                     <button id='place-order' type="submit" class="btn btn-primary btn-lg btn-block" data-loading-text="{% trans 'Submitting...' %}">{% trans "Pay" %}</button>
+                </div>
+            </div>
+        </div>
+    </form>
+{% endblock place_order %}
+
 {% block hiddenforms %}
     {{ bankcard_form.as_p }}
 {% endblock %}