Changing time on css doesn't destroy notification element on body

I was modifying your css to match my page styles and I noticed if I change the time inside `.ui-notification.killed` will make the element not being destroyed from the body.

This is the time I'm updating:

```
.ui-notification.killed {
/* This one doesn't work */
-webkit-transition: opacity ease 350ms;
-o-transition: opacity ease 350ms;
transition: opacity ease 350ms;
opacity: 0;
}
```

I've made a plunkr to demonstrade this problem: http://plnkr.co/edit/42f1DFpCJeH02oRqFzOi

Click the button then inspect the html, notice how the ui-notification html element is still on the page after it fades out the animation.