Inactive users are showing up in the list when adding permissions

Summary

Bamboo doesn't hide inactive users from the list of users when adding permissions to a plan, project and etc.

Steps to Reproduce

1. Go to the Bamboo administration > Overview > Security > Users page.
2. Flag a user as INACTIVE.
3. Access the Bamboo administration > Overview > Secutiry > Global permissions page.
4. Start typing the user's name inside the 'Add users' field under User access.

Expected Results

No results. Bamboo should display a message saying "No matches found".

Actual Results

It's possible to select the INACTIVE user and grant permissions.

Notes