message: move group label to right side and rotate.  Move away from center because
  there is likely always an edge through the center.  Also, thin edges
  for a generally cleaner look and less overlap when crossing over text.
diff: @@ -36,19 +36,18 @@ export class GraphStyles {
  // version group boxes
  selector: '$node > node',
  css: {
  - 'padding-top': '10px',
  - 'padding-left': '20px',
  - 'padding-bottom': '10px',
  - 'padding-right': '20px',
  'text-valign': 'top',
  - 'text-halign': 'center',
  + 'text-halign': 'right',
  + 'text-margin-x': '2px',
  + 'text-margin-y': '8px',
  + 'text-rotation': '90deg',
  'background-color': '#fbeabc' // pf-gold-100
  }
  },
  {
  selector: 'edge',
  css: {
  - width: 3,
  + width: 2,
  'font-size': '9px',
  'text-margin-x': '10px',
  'text-rotation': 'autorotate',
  