 class @TrackChanges
   reset_button_sel: '.reset-changes'
   undo_button_sel: '.undo-change'
-  tracked_elements_sel: 'span.del, span.ins'
+  tracked_changes_sel: '.track-changes span.del, .track-changes span.ins'
   tracked_feedback_sel: '.feedback-area.track-changes'
   submit_button_sel: '.submit-button'
   tracker: null

    @reset_button = @$(@reset_button_sel)
    @undo_button = @$(@undo_button_sel)
    @submit_button = @$(@submit_button_sel)
    @tracked_elements = @$(@tracked_elements_sel)
    @tracked_feedback = @$(@tracked_feedback_sel)
    
    @reset_button.click @reset_changes

  undo_change: (event) =>
    event.preventDefault()
    keyOfLatestChange = 0
    @tracked_changes = @$(@tracked_changes_sel)
    @tracked_changes.each ->
      key = parseInt($(@).attr('data-cid'))
      if key > keyOfLatestChange
        keyOfLatestChange = key
    @tracker.rejectChange('[data-cid="'+ keyOfLatestChange + '"]')
