Doesn't re-sort app windows when move task to top

To avoid app window isn't moved by new task order when move task to top

Change-Id: I5f8a901bb2f20a163b7fa0a59d1dc58c1fca5f1f
Signed-off-by: tingna_sung <tingna_sung@htc.com>
Merge remote-tracking branch 'upstream/du44' into du44