message: remove the refresh timestamp task in a smarter way
diff: @@ -209,7 +209,10 @@ const postMessagesListeners = {
  // We delete the callback for the timestamp task so the content script can do it itself
  if (settings.ts !== 'relative') {
  - TD.ui.updates.refreshTimestamps = () => false;
  + const tasks = Object.keys(TD.controller.scheduler._tasks).map(key => TD.controller.scheduler._tasks[key]);
  + const refreshTimestampsTask = tasks.find(t => t.period === 1e3 * 30);
  +
  + TD.controller.scheduler.removePeriodicTask(refreshTimestampsTask.id);
  }
  if (settings.old_replies) {
  