Draggable: Corrected containment detection and handles array
Draggable: Unit test and scrolling fixes

Forcing scrollbar in required tests for consistent behavior

Automatic scrolling does not change originalPointer
Draggable Unit: Fixes most of the scrolling tests
Enforces 1 move for simluating testDrag, since scroll events are sync
Draggable: Fixed "fixed" position dragging and their tests
Draggable Tests: Fixed checking for clone scrolling