Fix usage of renderer.getAxes in DataPointToolTip and other plugins

[wirew0rm]

Discussed in #638

^{Originally posted by sergiofdezperea November 13, 2023}
Hello,

I'm trying to migrate an application from java swing to javafx. This library looks perfect to replace jfreechart.

I was playing with the plugins and i can't make work DataPointTooltip using SimpleChartSample, when i check the render getAxes it returns an empty array.

In FXSampler it doesn’t work either for me.

Intitial Investigation:
Seems to have been broken on the 11.3 major release, where the semantic on the renderer.getAxes() list changed slightly from always returning the used axes to only holding the axes explicitly set by the user.

Workaround:

renderer.getAxes().addAll(chart.getAxes()); // explicitly set renderer axes until Tooltip Plugin is fixed