anchor.diff:      ev.stopPropagation()
   
       hist = fetch('histogram')
  -    if $(ev.target).closest('.selection_region_resizer').length > 0 && hist.selected_opinions      
  +    if $(ev.target).closest('.selection_region_resizer').length > 0 && hist.selected_opinions && !@local.touched
         hist.dragging = true
         @local.mouse_x_of_last_resize = ev.pageX
         save hist
  
positive.code:       else
  
          is_deselection = hist.selected_opinions && 
                            !@local.last_selection_via_drag            
          if is_deselection
            hist.selected_opinions = null
            if ev.type == 'touchstart'
  
negative.code:     # whether to show the shaded opinion selection region in the histogram
      draw_selection_area = !hist.selected_opinion && 
                              @root.proposal_mode == 'results' &&
                              (hist.selected_opinions || 
                                (!@local.touched && @local.mouse_opinion_value && !@local.hoving_over_avatar)) 
  
      DIV 
        className: 'histogram'
  