- File bookmarks can now have children, rendered with a chevron
- Group bookmarks can have an associated filePath; clicking opens the file,
clicking chevron toggles collapse
- 'Add as parent note' option in header context menu creates a group
with the current file linked
- 'Add child note' option in group context menu creates a sub-group
with the current file linked (parent note pattern)
- Default icon changed from 'file'/'folder' to '' (no icon)
- Chevron click always toggles collapse regardless of type
- File bookmarks: middle-click opens in new tab, mod+click opens in new leaf
- Group bookmarks: middle-click opens group's linked file in new tab,
mod+click opens group's linked file (click still toggles collapse)