Implement trading time limits

core/templates/partials/trading-time-list.html

@@ -22,8 +22,8 @@
       <td>{{ item.user }}</td>
       <td>{{ item.name }}</td>
       <td>{{ item.description }}</td>
-      <td>{{ item.start_day }} at {{ item.start_time }}</td>
-      <td>{{ item.end_day }} at {{ item.end_time }}</td>
+      <td>{{ item.get_start_day_display }} at {{ item.start_time }}</td>
+      <td>{{ item.get_end_day_display }} at {{ item.end_time }}</td>
       <td>
         <div class="buttons">
           <button