Change the str repr

templates/admin/base_site.html

@@ -0,0 +1,18 @@
+{% extends "admin/base_site.html" %}
+{% block extrahead %}
+    <style>
+        table {
+          width: 90%;
+          border-spacing: 0;
+          border-collapse: collapse;
+        }
+
+        table thead th {
+          text-align: left;
+        }
+
+        th {
+          word-break: break-all;
+        }
+    </style>
+{% endblock %}