Provided a tooltip with full time information for the document history dates.

 - Legacy-Id: 15714

Author: levkowetz

ietf/templates/doc/document_history.html

@@ -112,7 +112,7 @@ <h2>Document history</h2>
     <tbody>
       {% for e in events %}
         <tr class="anchor-target" id="history-{{ e.pk }}">
-          <td class="text-nowrap">{{ e.time|date:"Y-m-d" }}</td>
+          <td class="text-nowrap"><div title="{{ e.time|date:'Y-m-d H:i:s O' }}">{{ e.time|date:"Y-m-d" }}</div></td>
           <td class="text-center">{{ e.rev }}</td>
           <td>{{ e.by|escape }}</td>
           <td>{{ e.desc|format_history_text|safe }}</td>