~jaro/balkon

ref: 6e011c818a62f3d3ae7554f67f24fc8f3abf031b balkon/.golden/richParagraphLayout/hardBoxBreakRTL.golden -rw-r--r-- 6.2 KiB 
Test with AlignStart by default.

Describe box edges with extensible type.

Test line breaking in boxes.