message: Fix edge font-size
  also, formalize font for node and edge text
diff: @@ -10,9 +10,11 @@ const EdgeColor = PfColors.Green400;
  const EdgeColorDead = PfColors.Black500;
  const EdgeColorDegraded = PfColors.Orange;
  const EdgeColorFailure = PfColors.Red;
  +const EdgeFont = 'Verdana,Arial,Helvetica,sans-serif';
  +const EdgeFontSize = '6px';
  +const EdgeTextMargin = '6px';
  const EdgeWidth = 1;
  const EdgeWidthSelected = 3;
  -const EdgeText = '6px';
  const NodeColorBorder = PfColors.Black400;
  const NodeColorBorderDegraded = PfColors.Orange;
  const NodeColorBorderFailure = PfColors.Red;
  @@ -23,9 +25,10 @@ const NodeColorFillBox = PfColors.Black100;
  const NodeColorFillHover = PfColors.Blue50;
  const NodeColorFillHoverDegraded = '#fdf2e5';
  const NodeColorFillHoverFailure = '#ffe6e6';
  +const NodeFont = EdgeFont;
  +const NodeFontSize = '8px';
  const NodeWidth = '1px';
  const NodeWidthSelected = '3px';
  -const NodeText = '8px';
  export class GraphStyles {
  static options() {
  @@ -138,7 +141,8 @@ export class GraphStyles {
  return ele.data('isUnused') ? 'dotted' : 'solid';
  },
  'border-width': NodeWidth,
  - 'font-size': NodeText,
  + 'font-family': NodeFont,
  + 'font-size': NodeFontSize,
  'overlay-padding': '6px',
  'text-halign': 'center',
  'text-valign': 'center',
  @@ -229,12 +233,9 @@ export class GraphStyles {
  },
  'curve-style': 'bezier',
  'font-family': (ele: any) => {
  - return getTLSValue(ele, 'PatternFlyIcons-webfont', 'inherit');
  + return getTLSValue(ele, 'PatternFlyIcons-webfont', EdgeFont);
  },
  - 'text-rotation': (ele: any) => {
  - return getTLSValue(ele, '0deg', 'autorotate');
  - },
  - 'font-size': EdgeText,
  + 'font-size': EdgeFontSize,
  'line-color': (ele: any) => {
  return getEdgeColor(ele);
  },
  @@ -245,7 +246,10 @@ export class GraphStyles {
  'target-arrow-color': (ele: any) => {
  return getEdgeColor(ele);
  },
  - 'text-margin-x': '4px',
  + 'text-margin-x': EdgeTextMargin,
  + 'text-rotation': (ele: any) => {
  + return getTLSValue(ele, '0deg', 'autorotate');
  + },
  width: EdgeWidth
  }
  },
  