fixup interpreted-time-limit: fix "add dataset" page

Author: prandla

cms/server/admin/templates/add_dataset.html

@@ -62,7 +62,7 @@ <h1><a href="{{ url("task", task.id) }}">{{ task.title }} ({{ task.name }})</a>
         <span class="info" title="Total maximum time for each evaluation when using an interpreted language, in seconds."></span>
   Interpreted lang. time limit
       </td>
-      <td><input type="text" name="time_limit_interpreted_{{ dataset.id }}" value="{{ 1 if original_dataset is none else original_dataset.time_limit_interpreted or "" }}"/> second(s)</td>
+      <td><input type="text" name="time_limit_interpreted" value="{{ "" if original_dataset is none else original_dataset.time_limit_interpreted or "" }}"/> second(s)</td>
     </tr>
     <tr>
       <td>