It would be useful to have an easy way to retry all tasks that match the current dimensions selected on the task list page.

When I trigger CT tasks I sometimes need to manually retry some unsuccessful tasks: https://chrome-swarming.appspot.com/tasklist?c=name&c=created_ts&c=bot&c=duration&c=state&et=1501769400000&f=runid%3Armistry-20170803003851&l=500&n=true&s=created_ts%3Adesc&st=1262304000000

It would help eliminate this manual work if there was a mass retry button. Thanks!