Control overlay shows D-Pad with center key.
Implemented a method to find the clickable node that is closest to a specified point.
Modified algorithm to find the closest item on the display at a specified direction.
Modified the algorithm to take care of edge cases.
Implemented active navigation.  Click action does not properly function yet.
Click action now works properly.
Update nodes on TYPE_WINDOW_CONTENT_CHANGE.
Fixed null pointer exception.
Red highlight on the parent node.