Refactoring push reordering (issue 7139335)

-> This new approach is actually correct in emulating cascaded  pushing of
   items left, right, up and down.
-> Takes care of a couple crashes and some instances where reordering
   was not doing the right thing.

Change-Id: I016120e62f5d6fa1a2a6289c3badcb6ec230b2a3
1 file changed