Show announcements in weekly timetable views (SMART PLAN)

Closes "SMART PLAN" on #63

aleksis/apps/chronos/templates/chronos/timetable.html

@@ -113,7 +113,7 @@
     {% endif %}
   </div>
 
-  {#  {% include "chronos/hintsinplan.html" %}#}
+  {% include "core/announcements.html" with announcements=announcements show_interval=1 %}
 
   {# show full timetable on tablets, laptops and pcs #}
   <div class="timetable-plan hide-on-small-and-down">

aleksis/apps/chronos/views.py

@@ -168,6 +168,11 @@ def timetable(
         "dest": reverse("timetable", args=[type_, pk])
     }
 
+    if is_smart:
+        start = wanted_week[TimePeriod.weekday_min]
+        stop = wanted_week[TimePeriod.weekday_max]
+        context["announcements"] = Announcement.for_timetables().relevant_for(el).in_days(start, stop)
+
     week_prev = wanted_week - 1
     week_next = wanted_week + 1