[low priority] Empty folder issue

[vatterspun]

Background

This basically came from a desire to grab any and all DOC files on my computer and make sure they were backed up regardless of location. The idea here was to avoid losing any data even if I stored it in the wrong place accidentally. I've labeled this "low priority" because I don't think many people set up their machines this way.

Current behavior

When you select a root folder (e.g. My Documents), choose "include subfolders", and then filter for a specific group in those folders, you get a lot of empty folders in the "Backup to" folder.

Requested behavior

Don't create a folder for something if there's no content to put in it.