Description of problem:
The web UI has these three labels for group types: Normal, External, POSIX.

"Normal" is confusing because:
* It doesn't properly describe the group type (non-POSIX).
* What is actually considered normal? I would expect "normal" to mean
"default", but the group type selected by default is actually "POSIX".


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


How reproducible:


Steps to Reproduce:
For example, when adding a new user group:
1. User Groups - click Add.
2. The "Add User Groups" dialog shows the available group types.

Actual results:
"Normal"

Expected results:
"Non-POSIX" would work better - it's clearer and more descriptive. It would
also be consistent with CLI.

Additional info: