bug fix: could swipe left while mode is swipe right only

List item could be swiped left in some situation while the mode is swipe right only , and vice versa.

Step 1:
start SwipeListView Demo app.
change Swipe Mode to right 
set Right Offset to max (200dp) , Left Offset to zero.
set Right Action and Left Action to Reveal.
close Open On Long Press.

Step 2:
Touch the right part of a item and swipe right.And then swipe to left . Move your finger to the left edge of device.Then up your finger.

Step 3:
You can see the item is left swiped.