elm: access: Improves how to find the can_highlight of the widget.

elm: access: Improves how to find the can_highlight of the widget.
Returns EINA_FALSE if any of parents is EINA_FALSE when determining can_highlight.
To determine can_highlight for the parent of an object,
we try to find the parent of the parent again.
As it repeats, it traverses as much as depth size factorial (d!) However,
if any of the parent of the object has can_highlight of the widget
data is EINA_FALSE, it is eventually EINA_FALSE

orig:
366d904cb45a7c7dd6202c16ec19d73b8784e8e6
2212fffb35af18498d53f0da894218ba59f8c8ca

Change-Id: I5ad0cc5c36f017dbbc6f07a05919a3b95aaa513c
Signed-off-by: Shilpa Singh <shilpa.singh@samsung.com>