Furthermore, I think that your contract ration (set at 1/3 of the size) should be configurable. If you are
going to show activity on a tap, it shouldn't be hidden by the fingertip. If you allowed us to set this to
something larger than the original size, then it would be noticeable.
Another option would be to shrink the size of the entire progress view instead of just the stop button.
As originally described in #34 by @coneybeare: