Fix for properly ending dragging.

[apuder]

It seems that the dragging mode is not always properly terminated via the following sequence:

• Press on the first item
• Drag finger up to the top of the screen (forcing an ACTION_CANCEL)
• Then tap on the first item again In this case there does not seem to be a call to setIsDragging(false). What happened for me is that the item decoration is not properly restored. There might be a better way to handle this situation than what I did in this PR, but I'm sure you can clean it up. :)

[emileb]

Hey thanks for this, will take a look in a bit but looks good. THANK YOU!

[apuder]

Are you still maintaining your code?