added <main> and <aside> to checkout pages

src/pretix/presale/templates/pretixpresale/event/checkout_base.html

@@ -12,6 +12,7 @@
     {% trans "Checkout" %}
 {% endblock %}
 {% block content %}
+<aside aria-label="{% trans "Your cart" %}">
     <details class="panel panel-default cart" {% if "open_cart" in request.GET %}open{% endif %}>
         <summary class="panel-heading">
             <h3 class="panel-title">
@@ -52,8 +53,11 @@
             {% trans "Add tickets for a different date" %}
         </a>
     {% endif %}
+</aside>
+<main aria-label="{% trans "Checkout" %}">
     <h2>{% trans "Checkout" %}</h2>
     {% include "pretixpresale/event/fragment_checkoutflow.html" %}
     {% block inner %}
     {% endblock %}
+</main>
 {% endblock %}

src/pretix/presale/templates/pretixpresale/event/checkout_confirm.html

@@ -5,6 +5,7 @@
 {% load eventsignal %}
 {% block title %}{% trans "Review order" %}{% endblock %}
 {% block content %}
+<main aria-label="{% trans "Review order" %}">
     <h2>{% trans "Review order" %}</h2>
     {% include "pretixpresale/event/fragment_checkoutflow.html" %}
     <p>{% trans "Please review the details below and confirm your order." %}</p>
@@ -203,4 +204,5 @@
             <div class="clearfix"></div>
         </div>
     </form>
+</main>
 {% endblock %}

src/pretix/presale/templates/pretixpresale/event/order.html

@@ -8,6 +8,7 @@
 {% load phone_format %}
 {% block title %}{% trans "Order details" %}{% endblock %}
 {% block content %}
+<main>
     {% if "thanks" in request.GET or "paid" in request.GET %}
         <div class="thank-you">
             <span class="fa fa-check-circle" aria-hidden="true"></span>
@@ -426,4 +427,5 @@
             </ul>
         </div>
     {% endif %}
+</main>
 {% endblock %}