PicoGraphics::circle draws a circle with "diameter = 2 * radius + 1px" #1106
Description
PicoGraphics::circle implementation for some reason adds 1px to the circle diameter. This causes unexpected result on a display when the shape is expected to be blended with other figures.
Attached is an example, expected 10px diameter but drawn 11px. PicoGraphics::circle implementation adds 1px to the pixel_span calls, the reason for that is unclear.
