Histogram or Barchart not drawing last Bar

[ahmadnav]

Describe the bug
When drawing a bar chart using histogram renderer (Very similar to the ones in example) the last bar graph isn't drawn. When the following code is ran the last bar (9 category) is not drawn as shown in lastBarNotDrawn.png. How ever if I add one extra data point at uknown category (which would be 10) the 9 category bar is drawn as shown in lastBarDrawnWithUC.png.
To Reproduce
The following code is ran and the XYChart displayed in a Stage stack pane. But the XYchart can be displayed any where. Also you can just use the generateMultiSeriesBarChart function to create a chart and add DataSeries to it.

Thank you for this very helpful library and looking into this issue.

        final DefaultDataSet dataSet = new DefaultDataSet("Data 1");
        dataSet.setStyle("strokeColor=black;fillColor=black;strokeWidth=1.0");
        final DefaultDataSet dataSet1 = new DefaultDataSet("Data 2");
        int sampleSize = 10;
        ArrayList<String> categories = new ArrayList<String>();
        for (int n = 0; n < sampleSize; n++) {
            categories.add(String.valueOf(n));
        }

        ArrayList<DefaultDataSet> dataSets = new ArrayList<>();
        dataSets.add(dataSet);
        dataSets.add(dataSet1);

        XYChart c = chartFX.generateMultiSeriesBarChart("xAxis Name","yAxis Name",categories,dataSets); 
        root.getChildren().add(c); 
        ((CategoryAxis)c.getAxes().get(0)).setMaxMajorTickLabelCount(sampleSize);

        Platform.runLater(()->{
            for (int n =0 ; n < sampleSize; n++) {
                ((DefaultDataSet)c.getRenderers().get(0).getDatasets().get(0)).add(n,n+1);
                ((DefaultDataSet)c.getRenderers().get(0).getDatasets().get(1)).add(n,n*2);
            }
        });

    public XYChart generateMultiSeriesBarChart(String xAxisName, String yAxisName, ArrayList<String> categories,ArrayList<DefaultDataSet> dataSets){

        final CategoryAxis categoryAxis = new CategoryAxis(xAxisName); 
        categoryAxis.setCategories(categories);
        categoryAxis.setOverlapPolicy(AxisLabelOverlapPolicy.SHIFT_ALT);

        final DefaultNumericAxis yAxis = new DefaultNumericAxis(yAxisName); 


        // Renderer Setup
        final HistogramRenderer renderer = new HistogramRenderer();
        renderer.setPolyLineStyle(LineStyle.NONE);
        renderer.setDrawBars(true);
        renderer.setShiftBar(true);
        renderer.setDrawMarker(false);
        renderer.setBarWidthPercentage(50.0);
        // Set axes and dataset.
        renderer.getDatasets().setAll(dataSets);

        final XYChart lineChartPlot = new XYChart(categoryAxis,yAxis);
        lineChartPlot.setAnimated(false);
        lineChartPlot.legendVisibleProperty().set(true);
        lineChartPlot.getRenderers().setAll(renderer);

        // Plugins
        lineChartPlot.getPlugins().add(new ParameterMeasurements());
        lineChartPlot.getPlugins().add(new EditAxis());
        final Zoomer zoomer = new Zoomer();
        lineChartPlot.getPlugins().add(zoomer);

        return lineChartPlot;
    }

Environment:

• OS: Ubuntu 20.04.1 LTS

• Java version: 11.0.13

• JavaFx version: 11.0.2

• ChartFx version: [11.2.5]