feat(schedule): improve predefined schedule groups

gallery/easel/route/view/schedule/templates/channel.html

@@ -37,15 +37,14 @@ locale=request.state.language)}}
   <thead>
     <tr>
       <td></td>
-      <td></td>
+      <td style="width:100%"></td>
     </tr>
   </thead>
   <tbody>
     {% for value in response.values %}
     <tr class="{{'d-none' if (live and not value.live) else 'table-success' if (not live and value.live) else ''}}">
       <td>
-        <span>{{value.start.strftime('%H:%M')}}</span>
-        <span class="small ms-1">({{(value.end - value.start) | timedelta_format}})</span>
+        <span>{{value.start.strftime('%H:%M')}}</span>&nbsp;<span class="small ms-1">({{(value.end - value.start) | timedelta_format}})</span>
       </td>
       <td>{{value.label}}</td>
     </tr>