~jaro/balkon

ref: 073b66e243ec1ffa8f1627756a9bb8dcc533e677 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.