small improvements in popup race

rowers/templates/racelist.html

@@ -8,6 +8,7 @@
         <th>Event</th>
         <th>Country</th>
         <th>Course</th>
+        <th>Distance</th>
         <th>Click for Details</th>
       </tr>
     </thead>
@@ -25,6 +26,7 @@
     <td><a href="/rowers/virtualevent/{{ race.id }}">{{ race.name }}</a></td>
     <td>{{ race.course.country }}</td>
     <td><a href="/rowers/courses/{{ race.course.id }}">{{ race.course.name }}</a></td>
+    <td>{{ race.sessionvalue }} m</td>
     <td>
       {% if rower %}
       {% if race|can_register:rower %}