X-Axis Line not visible

[mgm-rwagner]

Describe the bug
After the upgrade from 3.8.8 to 4.0.4 the X-Axis Line is moved up and therefore it is behind the chart and invisible.

To Reproduce

chart.getStyler()
	.setPlotGridLinesColor(ChartColor.WHITE.getColor());

chart.getStyler()
	.setLocale(locale)
	.setChartTitleVisible(true)
	.setPlotBorderVisible(false)
	.setLegendBorderColor(null)
	.setPlotBackgroundColor(ChartColor.LIGHT_GREY.getColor())
	.setChartBackgroundColor(ChartColor.WHITE.getColor())
	.setLegendPadding(5)
	.setLegendPosition(LegendPosition.OutsideS)
	.setLegendLayout(LegendLayout.Horizontal);

Screenshots
With version 3.8.8:

With version 4.0.4:

Expected behavior
The X-Axis Line is visible as it was with version 3.8.8

[timmolter]