Item sizes are all the same in Column / Horizontal Layout

[Sam-Spencer]

Bug Report
The "waterfall" behavior doesn't work when using the column / horizontal layout option. If you have a number of items with varying sizes and apply the .scrollOptions(direction: .horizontal) modifier, the items take up a defined amount of height and do not "waterfall" into one another.

I believe this has to do with how the sizes of items are calculated; the calculations aren't correct for the horizontal layout because they may still be prioritizing the same factors used to calculate the vertical waterfall behavior.