Drawing circle from mouse_down method glitched

[ckski]

To reproduce use the following code:

def setup():
    size(400,400)

def draw():
    pass
            
def mouse_down():
    fill_circle(mouse_x, mouse_y, 10)

Click in the top left hand corner repeatedly and after a while the circle will start being drawn at the wrong scale and position.

When testing the fix, test out with the ellipse function also.

[ckski]

The fill_circle method calls helper_fill_arc which manipulates the scale and translation of the canvas. Something is likely not getting reset properly.

[ckski]

One suggested solution is to change the implementation of the helper_fill_arc and helper_stroke_arc to not need to use translate and scale.

[lawruble13]

One suggested solution is to change the implementation of the helper_fill_arc and helper_stroke_arc to not need to use translate and scale.

I think this is the best solution, at the original time of writing arc and ellipse did not yet exist, but I believe they were added to later versions of ipycanvas. Another solution is to use canvas.save and canvas.restore instead of manually undoing the transformations