Treat saved search as normal item

[slangmgh]

Saved search item just like dynamic virtual folder, the search results are the child items, if we click the expand icon in data explorer window, it can list the child items(search results) in data explorer, these child items just like the item link to the real item.

if we can treat saved search like these, we can re-organize the whole tree structure with different tree view dynamicly. using link we can only staticly re-organize the tree structure.