Does not work with recursive views that include jobs within folders

The change in Jenkins 1.512 which adds support for views containing items child items from within folders is incompatible with the current way the plugin works.

Steps to reproduce:

1. Install folders plugin
2. Create two jobs at root: A & B
3. Create three folders at root: C, D & E
4. In each of the folders create two jobs: C/F, C/G, D/H, D/I, E/J, E/K
5. Mark the following jobs as favorite: A, C/F and the folder D.
6. Create a view with the `Recurse in subfolders` option selected and a regex of `.*` and the Favorites Filter

Expected results:

The view should contain the following items only: A, C/F and D

Actual results:

The view contains:

A
C/F
C/G
D
D/H
D/I
E/J
E/K