message: fix bar chart value overlap with legend
diff: @@ -322,6 +322,9 @@ function nvd3Vis(element, props) {
  });
  }
  if (showBarValue) {
  + // Add more margin to avoid label colliding with legend.
  + const top = chart.margin().top;
  + chart.margin({ top: top + 24 });
  setTimeout(function () {
  drawBarValues(svg, data, isBarStacked, yAxisFormat);
  }, ANIMATION_TIME);
  