Comment 3 for bug 1352028

Tested on Mahara version 1.10.0dev (2014091600). 3 times to make sure it works. How to test:

1. Log in as admin (tested both site admin and institution admin)
2. Go to Users → Add users by CSV
3. Click on Browse... → Select your CSV file with 1000 users.
4. Click on Add users by CSV → A progress bar should appear → Passed
5. Go to Groups → Add groups by CSV
6. Click on Browse... → Select your groups CSV file
7. Click on Add groups by CSV → A progress bar should appear → Passed
8. Go to Update group members by CSV
9. Click on Browse... → Select your update groups CSV file
10. Click on Update group members by CSV → A progress bar should appear → Passed