Possibility of an horizontal TileView Widget?

I wonder if there is currently a method to change the direction of the tileview/listview widgets from vertical order to horizontal, so they’ll become an alternative to the scrollbox widget? If not, are there any plans for that?

Because they have a less perfomance impact than the scrollbox, what is desireable for mobile. (source)
I’ve looked into the their UMG classes and their slate classes but couldn’t find any fitting variables.
Also because it was asked on the forum by someone month’s ago: will there be the possibility to modify the bar images etc inside the designer? (forum post)