anchor.diff:          fontSize: 30
           fontWeight: 700
           color: focus_blue
  -        visibility: if set_in_grayscale then 'hidden'
  +        visibility: if @props.backgrounded then 'hidden'
   
         # Keep feedback centered over handle, but keep within the bounds of 
         # the slider region when the slider is in an extreme position. 
  
positive.code:         boxShadow: '0px 2px 0px black'
          cursor: 'pointer'
  
      if selected_wing_point
        css.grayscale decision_board_style
        decision_board_style.opacity = '.4'
      else if selected_point
        decision_board_style.borderColor = "#ccc"
  
      if your_opinion.published
        can_opine = permit 'update opinion', @proposal, your_opinion
  
negative.code:         marginLeft: -SLIDER_HANDLE_SIZE / 2
          top: -9
          position: 'relative'
          visibility: if @props.backgrounded then 'hidden'
  
        face_style = 
          position: 'absolute'
  