Wt

At the moment, when WBoxLayout is implemented using FlexLayoutImpl, any spacing is done using a margin.

This leads to an inconsistency between how flex layouts are rendered and how JavaScript layouts are rendered when the spacing is more than 2 times the contents margins.

I added an example to demonstrate what I'm talking about. It seems to me that gap (row-gap or column-gap) is really the appropriate property to set in order to make sure rendering is consistent.

I noticed this while working on issue #10967, and saw that the spacing variable was unused in the adjust function of FlexLayoutImpl.js.