Hierarchical view of saved searches

[headfog]

First off, thank you. I've tried a few galleries and yours is far ahead with its performance and ease of use.

I've been playing around the latest version and just found out about .saved_searches.pg2conf.
Is there any syntax/structure allowing to display the saved searches hierarchically? For example, one could have a category called "People" containing searches based on person, and another called "Cities" for searches based on keyword "city" or "architecture".