Scatter plot with fill doesn't clip line

[BendRocks]

Issue: (Describe the bug here)
When FillY is enabled with a scatter plot, the trace lines are not correctly clipped.

ScottPlot Version: (What NuGet package are you using?)

5.0.34.0

I cloned the repo and modified the Sandbox.Winforms.Form1.cs

Code Sample: See http://scottplot.net/faq/repro/ for tips about creating reproducible code samples

The following code was put into the Form1 constructor in the Sandbox.Winforms

  double[] xs = { 1, 10, 100, 1000, 10_000, 100_000 };
  double[] ys = { -50, -50, 10, -50, -80, -80 };

  // add log-scaled data to the plot
  ScottPlot.Plottables.Scatter sp = formsPlot1.Plot.Add.Scatter(xs, ys);
  sp.LineWidth = 5;
  sp.FillY = false;
  sp.FillYValue = -200;
 
  formsPlot1.Plot.Axes.Bottom.Min = 100;
  formsPlot1.Plot.Axes.Bottom.Max = 10000;

The output is as expected, with the trace clipped at the left and right edges of the plot:

If the same code is used, with sp.FillY set to true, we see the following output:

Notice above that the lines are no longer clipped at the left and right. Note the different shading of the fill is due to the bug #3791. That same block of code in scatter.cs code is likely the culprit since the lines render correctly when FillY is false.

[CoderPM2011]

This is because rp.CanvasState.Restore() does not restore the state to what it was before calling rp.CanvasState.Clip().

ScottPlot/src/ScottPlot5/ScottPlot5/Plottables/Scatter.cs

Lines 144 to 154 in 093994e

	PixelRect rectAbove = new(rp.DataRect.Left, rp.DataRect.Right, yValuePixel, rect.Top);
	rp.CanvasState.Clip(rectAbove);
	fs.Color = FillYAboveColor;
	Drawing.DrawPath(rp.Canvas, paint, fillPath, fs, rectAbove);
	rp.CanvasState.Restore();
	PixelRect rectBelow = new(rp.DataRect.Left, rp.DataRect.Right, rect.Bottom, yValuePixel);
	rp.CanvasState.Clip(rectBelow);
	fs.Color = FillYBelowColor;
	Drawing.DrawPath(rp.Canvas, paint, fillPath, fs, rectBelow);
	rp.CanvasState.Restore();

Before calling rp.CanvasState.Clip()

After calling rp.CanvasState.Clip()

After calling rp.CanvasState.Restore()

---

I found that this might be because the rp.CanvasState.Save() function wasn't used.

[swharden]

Fixed in 79e1918 - thanks both of you for your help! This fix will be in the next release 👍 🚀