seems the WebGraphics object has a LineCap property to allow Round / Square or !@#$% ends.
Is there a declare or something to apply that to the normal Picture/Canvas Graphics object?
(for both macOS and Windows?
Trying to draw a thick line between two rectangles looks wrong, because the default seems to be a Round linecap
And I don't have the option of drawing the lines first and then using the Rectangle to "cut them off"