I can query a higher level of a hierarchical Tag

(User Story, Investigate , Priority: High, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Summary: In other words, if I have an existing Tag hierarchy, containing "Clothing/Dresses/Long", I can navigate to "Clothing/Dresses" and that will include everything in the sub-categories.
Depends Upon:
The display should make clear what elements belong to this top-level Tag, and which belong to which sub-Tags.
To get to this display, the elements in a hierarchical Tag should display separately. That is, when I display the Tag "Clothing/Dresses/Long", clicking "Clothing" should show everything under Clothing; "Dresses" should display everything under Clothing/Dresses; and "Long" should just display the Things that have Clothing/Dresses/Long.