_layouts: Only display schedule event location if available

Author: kevinlin1

_layouts/schedule.html

@@ -25,7 +25,9 @@ <h2 class="schedule-header">{{ day_name }}</h2>
             style="top: {{ top }}px; height: {{ height }}px;">
           <div class="name">{{ event_name }}</div>
           <div class="time">{{ event_data.start }}–{{ event_data.end }}</div>
+          {% if event_data.location %}
           <div class="location">{{ event_data.location }}</div>
+          {% endif %}
         </li>
       {% endfor %}
       </ul>