Track the last modification time on every BookmarkItem. The timestamp
is updated when editing a bookmark or folder, moving an item, or
updating a favicon. This aligns with the Netscape bookmark HTML format
used by Chromium and Firefox for bookmark export/import
(LAST_MODIFIED attribute).
Store a creation timestamp on every BookmarkItem, for both bookmarks
and folders.
This aligns with the Netscape bookmark HTML format used by Chromium
and Firefox for bookmark export/import (ADD_DATE attribute).
This patch adds BookmarkStore to manage bookmarks stored in a JSON file
in the application settings directory. It supports both folders and
bookmarks. It does not yet support arbitrary editing of bookmarks, other
than updating stored favicons.
