Specific folder... is a new chip source. Long-press a chip, tap the source row, pick "Specific folder...", and choose any folder in your library. The chip then shows that folder's contents -- subfolders as cards, books as books, drilldown supported.
Fixes
- Sort priority applies to Home (folders) and Specific-folder chips.
- Drilling into a subfolder from a Specific-folder chip sorts the books inside using sort levels 2+, like Series and Author stack drilldowns.
Tweaks
- Chip source picker reshuffled: Recently read / Latest added on row 1, Home (flattened) full-width on row 2, Home (folders) paired with Specific folder on row 3.