Minor fix for drawer swipe

[RobbWatershed]

• Use item unique IDs instead of positions to keep track of swiped states (positions would become meaningless as soon as items are added or removed from the list)
• Don't transmit touch events to target items that are not in swiped state

NB : These changes fix a weird behaviour when dragging the drag handle of a swipeable item over the drag handle of a sibling - the item would keep floating in mid-air as its UP touch event wouldn't be transmitted to the correct item

[RobbWatershed]

Hi there~

Any chance to get that one merged soon-ish ? ^^

[mikepenz]

oh sorry. I'll have a look :)

[RobbWatershed]

Great, thanks a lot !