Fix redundant tick field

vrobbler/templates/videogames/videogame_detail.html

@@ -62,7 +62,7 @@
                 <tr>
                     <td>{{scrobble.timestamp}}</td>
                         <td>{% if scrobble.long_play_complete == True %}Yes{% endif %}</td>
-                    <td>{% if scrobble.in_progress %}Now playing{% else %}{{scrobble.playback_position|natural_duration}}{% endif %}</td>
+                    <td>{% if scrobble.in_progress %}Now playing{% else %}{{scrobble.playback_position_seconds|natural_duration}}{% endif %}</td>
                     <td>{% for platform in scrobble.video_game.platforms.all %}<a href="{{platform.get_absolute_url}}">{{platform}}</a>{% if not forloop.last %}, {% endif %}{% endfor %}</td>
                 </tr>
                 {% endfor %}