The bookmarks list can now render as 1 (default), 2, or 3 columns
instead of always being a single-column list, admin-configurable via
a pill picker on the Widgets tab. Column count is a new bookmarksColumns
field on GlobalSettings (same idiom as the other scalar admin knobs)
and rides along in the public GET /api/bookmarks response so the
sidebar picks it up without a separate request.
Claude
ac154322f8