Feature Request: Show Most 'Recent File Date' in repository directories view

[stewrg]

Currently, when viewing a directory in the files repository the only date shown is the directory last modified date, and not the date of the most recent file uploaded to that directory.

It would be useful that where directories are used/created by users, that subdirectories are listed with the date of the most recent uploaded file/modification, so at a glance users could see what directories contain recent files without having to browse down every tree