unproportional clock dimensions

[Eyal Wiener]

The clock ring has bad dimensions, or being painted with a wrongly scaled context, because it is come out disproportional by a few pixels.

it can easily be noticed when drawing the ring in orange, and filling the entire ring with black events,
and streching the clock window into full screen.
you can see that the event ring is sometimes wider then the clock ring, and sometimes thinner,