#86 Revocation rendering if needed

* renders revocation warning on the index view if a revocation exists

templates/table/revocation_warning_col.html

@@ -0,0 +1,14 @@
+{% load i18n fontawesome_5 %}
+
+{% if has_revocations %}
+    <strong>
+        <a href="{{url}}" title="{% trans 'Revocations exists' %}">
+            {% fa5_icon 'ban' %}
+            {{content}}
+        </a>
+    </strong>
+{% else %}
+    <a href="{{url}}" title="{{tooltip}}">
+        {{content}}
+    </a>
+{% endif %}