Better fast swiping user experience.

This behaviour feels more like Google's Gmail application when you archive messages from your inbox.

In code :

`swap` has to be `false` in these circumstances:

*  `deltaX < 0 && swapRight` (You can't swipe to the right when going the the left)
*  `deltaX > 0 && !swapRight` (You can't swipe to the left when going to the right)

But, fast swiping to the other direction is still possible if you swipe faster or you move the row far enough and leaves it.

If you don't understand, make sure you test the difference in swiping in 2 both directions. ;)