Only show "valid VAT ID" checkmark if VAT ID was entered (Z#23235033)

src/pretix/base/templatetags/locale.py

@@ -0,0 +1,32 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+from django import template
+from django.conf import settings
+
+register = template.Library()
+
+
+@register.filter
+def human_readable_locale(value):
+    if not value:
+        return ''
+    return dict(settings.LANGUAGES).get(value, '')

src/pretix/control/templates/pretixcontrol/order/index.html

@@ -1045,7 +1045,7 @@
                                         <dt>{% trans "VAT ID" %}</dt>
                                         <dd>
                                             {{ order.invoice_address.vat_id }}
-                                            {% if order.invoice_address.vat_id_validated %}
+                                            {% if order.invoice_address.vat_id and order.invoice_address.vat_id_validated %}
                                                 <span class="fa fa-check" data-toggle="tooltip" title="{% blocktrans trimmed %}Valid EU VAT ID{% endblocktrans %}"></span>
                                             {% elif order.invoice_address.vat_id %}
                                                 <form class="form-inline helper-display-inline" method="post"