~jaro/balkon

ref: 3e3fef4440b5d982144bdb4b13a3d784ba686233 balkon/.golden/richParagraphLayout/hardBoxBreakRTL.golden -rw-r--r-- 6.7 KiB 
Add content rect to Fragment.

Test with AlignStart by default.

Describe box edges with extensible type.

Test line breaking in boxes.