Issue: (Describe the bug here)
Setting plot background data and figure to transparent creates a see-through application, instead of showing whatever color is behind.

ScottPlot Version:
ScottPlot.Avalonia 5.0.21

Code Sample:

var transparent = ScottPlot.Colors.Transparent;
ScottPlot.Plot plot = new();

/* code to reproduce the bug */
plot.Style.Background(figure: transparent, data: transparent);

Image Example
I'll set only the figure: transparent to show the issue, you can see it becomes see-through and you can see my VS code behind: