Use case or problem
Folders are natural tools for namespacing/delimiting the context for articles.
The use case is to filter search results to include only files that are contained in some folder.
Proposed solution
Option A
Provide a context menu option when right-clicking on a folder to search in this folder.
Option B
Provide a special search keyword-option to specify a containing folder filter
full-text search query in:"containing folder name"
