Update mobile schedule

Display track details on talks if available.
Show day end time slot as per desktop view.

pinaxcon/templates/symposion/schedule/_mobile.html

@@ -3,9 +3,9 @@
 {% load waffle_tags %}
 
 
+{% with timetable|day_has_tracks:timetable.day as has_tracks %}
+
 {% for row in timetable %}
-{% if forloop.last %}
-{% else %}
 {% for slot in row.slots %}
 <div class="mobile-slot my-3">
   {% if forloop.first %}
@@ -19,8 +19,6 @@
       <br>
       {{ slot.content.speakers|join:", "}}
     </p>
-  {% listlookup timetable.rooms forloop.counter0 as room_names %}
-  <p><em>{{ room_names }}<br />ends {{ slot.end }}</em></p>
     {% endif %}
   {% elif label == "shortbreak" %}
   {% else %}
@@ -34,10 +32,28 @@
   {% endif %}
   {% endwith %}
 
+  <p><em>
+    {% if has_tracks %}
+    {% with slot.rooms|listlookup:forloop.counter0|trackname:timetable.day as track_name %}
+    {% if track_name %}{{ track_name }} &mdash; {% endif %}
+    {% endwith %}
+    {% endif %}
+    {{ slot.rooms|join:", "}}
+    <br />
+    ends {{ slot.end }}
+  </em></p>
+
   {% if edit_schedule %}
   <a class="btn btn-secondary btn-sm edit-slot" role="button" data-action="{% url "schedule_slot_edit" schedule.section.slug slot.pk %}" href="#">Edit</a>
   {% endif %}
 </div>
 {% endfor %}
+{% if forloop.last %}
+<div class="mobile-slot my-3">
+  <h3>{{ row.time|date:"h:iA" }}</h3>
+  <p><em>Day End</em></p>
+</div>
 {% endif %}
 {% endfor %}
+
+{% endwith %}

pinaxcon/templatetags/lca2018_tags.py

@@ -103,6 +103,9 @@ def day_has_tracks(timetable, day):
 
 @register.filter()
 def trackname(room, day):
+    if not room:
+        return None
+
     try:
         track_name = room.track_set.get(day=day).name
     except Track.DoesNotExist:

pinaxcon/templatetags/lca2019_tags.py

@@ -48,12 +48,12 @@ def any_is_void(invoices):
     return False
 
 
-@register.simple_tag
+@register.filter
 def listlookup(lookup, target):
     try:
         return lookup[target]
     except IndexError:
-        return ''
+        return None
 
 
 @register.filter