Tweaks the app drawer behaviour to feel more natural to use.
It's kind of hard to explain, but here we go:
- Only trigger the app drawer open/close animation if the flick goes over an eighth of the screen so that small flicks do not trigger it
- Adjust easing curve to be OutQuad so that fast flicks don't feel slow (have to slow to a stop, and then animation triggers)
- Increase animation duration to account for OutQuad curve
- Animate opacity of application icons as the app drawer comes in and out