Documentation addition

[GoldenJoe]

I'm putting together a bar chart, with a layout in which a scrollview has an accompanying axis view on its left and bottom. I'm a fan of the visual layout style, so I was a bit confused when this code resulted in a scrollview with 0 height:

sv(
   view_axisX,
   view_axisY,
   view_scroll.sv(
      view_content
   )
)
        
layout(
   0,
   |-view_axisY.width(20)-view_scroll-|, // It would be helpful to know that only view_axisY gets anchored to the top here.
   0,
   |-view_axisX.height(20)-|,
   0
)
view_content.followEdges(view_scroll)

It is because only the first view in the "row" gets anchored to the top of the parent view (in this case view_axisY). Figure it might be helpful to others to mention that in the Vertical documentation.