Frame around RadarPlot

Description: When adding a RadarPlot the default settings give the plot a frameless appearance. Aesthetically, frame around the radar plot area might be preferred by some users, so the natural option is to call the Frame() method to draw the frame around. However, only the top and left frames are drawn, while the right and bottom are not.

Code example: The following code shows this unexpected behavior.

var plt = formsPlot1.Plot.AddRadar(_plotLux);
formsPlot1.Plot.Frame(visible: true);

This is not a big problem, since an approximated-framed RadarPlot (please note that the data area does not go right up to the edge of the plot) can actually be obtained, although it's slightly counterintuitive because the AddRadar function enables both the frame and the grid at the same time.

var plt = formsPlot1.Plot.AddRadar(_plotLux, disableFrameAndGrid: false);
formsPlot2.Plot.Grid(enable: false);

What's causing the issue?
The AddRadar method doesn't allow for independently disabling the frame and the grid:

Going down the rabbit hole, the Frameless() function is implemented this way:

And the code for hiding each axis is:

It appears that hiding the axis also sets the private property PixelSizePadding to 0 (the one causing the issue). However, calling the Frame() method, as shown in the code at the very beginning, does not reset the value of this property, thus causing the bottom and right frames not to be drawn.

It's slightly counterintuitive that Frame() method just modifies the axis Visible property while the Frameless() method modifies the Visible and the three PixelSize... properties.

Possible solutions:

1. Call AddRadar disabling frame and grid; later enable the grid (as shown above). That's effective but counterintuitive. This keeps the plot's data area smaller than the plot control.
2. Modify the Frame() method in order to set back the three PixelSize... properties to their default values when the visible parameter is set to true. Note that the PixelSize... properties are private; and keep in mind that modifying them might cause unwanted side-effects.
3. Modify the Frameless() method so that PixelSizePadding is set equal to 1 (that's enough to allow the bottom and right borders to be drawn when calling Frameless() first and Frame() later). This is the most radical solution, but it might not be appropriate in other contexts.