Yes, we should support this as an additional option to setLayoutOrientation.
get/setLayoutOrierntation now take one of the following:
. VERTICAL - default and only option in pre 1.4, a single column of cells.
. VERTICAL_WRAP - flow vertically than horizontally depending upon the visibleRowCount property. -1 is interpreted to mean the number of rows depends upon the list height.
. HORIZONTAL_WRAP - flow horizontally then vertically depending upon the visibleRowCount property. -1 is interpreted to mean the number of columns depends upon the list width.