BuiltinActions :: BookmarkStore - Store bookmark for a list entry (Ctrl-down)
The action allows storing a bookmark for the currently selected list or tree entry. The action is part of the default context menu for lists and trees (...nav). In order to delete the bookmark, the BookmarkRemove action can be called.
When locating the next or previous bookmark in the list (BookmarkNext, BookmarkPrevious), the next or previous entry marked in the list is provided regardless on the tree level. When the entry is hidden, the tree automatically expands to the selected item.
Return value: - internal feature (not documented) ( logical )