~jaro/balkon

ref: 04fdd17a9811ee19b7ab9537b709171aab2d23a5 balkon/.golden/richParagraphLayout d---------
Describe box edges with extensible type.
Test interaction between boxes and mixed script.
Test line breaking in boxes.
Handle ancestor boxes in rich layout.
Add ancestor boxes to interface.
Test layout with mixed font sizes.
Test Rich line wrapping.
Test Rich layout.