Update start/stop button text when resetting stopwatch

If you press the "Reset" button on the stopwatch *while it's running*, the text on the start/stop button goes to "Stop". Then even if you toggle the button back to "Start" the stopwatch won't ever start up again.

Here's a JsFiddle with the current code where you can reproduce the problem:
http://jsfiddle.net/reddishRadish/Xvkq9/2

Here's a JsFiddle with the fix in it (using the code with my fix):
http://jsfiddle.net/reddishRadish/Xvkq9/3