Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1147033
Description of problem: In the Organization Editor, when filtering out any of the categories (e.g. Capsules, Media), clicking the "+" icon will add all original items. From a UX perspective, the icon should only add the items that weren't filtered out.

Version-Release number of selected component (if applicable): 6.0

How reproducible: always

Steps to Reproduce:
1. Enter the Organization Editor for any organization
2. Select any of the categories on the bottom left (e.g. Users, Subnets)
3. Apply a filter to limit the select-able options
4. Click the "+" icon

Actual results: Adds all options, including those filtered out.

Expected results: Should only add options that have not been filtered out.

Additional info: None