message: updated bubble chart to dark mode
diff: @@ -1427,13 +1427,20 @@ function genSlide15(pptx) {
  y: 4.0,
  w: "45%",
  h: 3,
  - plotArea: { fill: { color: "363636" } },
  + chartArea: { fill: { color: "404040" } },
  + plotArea: { fill: { color: "202020" } },
  + catAxisLabelColor: "F1F1F1",
  + catAxisLabelFontSize: 10,
  catAxisOrientation: "maxMin",
  - valAxisOrientation: "maxMin",
  showCatAxisTitle: false,
  - showValAxisTitle: false,
  + //
  + valAxisLabelColor: "F1F1F1",
  + valAxisLabelFontSize: 10,
  valAxisMinVal: 0,
  + valAxisOrientation: "maxMin",
  + showValAxisTitle: false,
  + //
  dataBorder: { pt: 2, color: "e1e1e1" },
  dataLabelFontFace: "Arial",
  dataLabelFontSize: 10,
  