Dunlop.register_setup 'categorize-as-button', (target)->
  button = $('#categorize-as-button')
  return unless button.length
  button.click ->
    selected_ids = Dunlop.selected_ids() # proxy for MultiSelect.selected_ids()
    return alert("Nothing selected") unless selected_ids.length

    selector = $("#categorize-as-scenario-selector")
    return unless target_scenario = selector.val()
    if confirmation_t = button.data("confirmationT")
      message = t_substitute_params confirmation_t,
        target_scenario: selector.text() || target_scenario
      return unless confirm(message)
    $.post Routes.dunlop_categorize_as_workflow_instances_path(),
      ids: selected_ids.join("~")
      scenario: target_scenario