return the bookmarks, the mutable internal store. use copy() to get a deep copy.
remote status indicator. -1 not loaded 0 successful 1 unsuccessful.
a remote bookmark is one that is a copy of a folder at the remote location. If it's a remote folder, then we use it to maintain the bookmarks. We'll keep a local copy, but this may be updated. null indicates that this this a not a remote bookmark.
set the remote status.
set this to the location of the master copy of the bookmarks, or null.