Privacy : Files/blacklist child window is not modal

Launch Privacy app, choose Files tab.
Check several combinations of the check boxes under "Don't record activity for the following type of files:"
    The items should be checked.
Underneath the "Don't record activity in the following folders:" box should be a "+" and "-" button. Click on the "+" button
    A file dialog should appear.
    User should not be able to interact with anything in the main window while the file dialog is active?

Observed - can change the options in the main window.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubuntu-settings 13.10.0
ProcVersionSignature: Ubuntu 3.9.0-6.13-generic 3.9.6
Uname: Linux 3.9.0-6-generic x86_64
ApportVersion: 2.10.2-0ubuntu1
Architecture: amd64
Date: Wed Jun 19 17:06:40 2013
InstallationDate: Installed on 2013-06-17 (2 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130523.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-settings
UpgradeStatus: No upgrade log present (probably fresh install)