ClickHandler should not fire an event on Strokes

```
What steps will reproduce the problem?
1. Add a ClickHandler
2. Draw a long stroke (e.g., a curve)
3. The ClickHandler is fired. This shouldn't happen. The ClickHandler
should fire only if the pen hasn't traveled too far, and (possibly) if the
click happens relatively quickly. 
```

Original issue reported on code.google.com by `ron...@gmail.com` on 16 Nov 2007 at 3:07
