Description of problem:
"Add user" window GUI breaks after editing any user. It looks like the "edit user" windows (with unix username as a plain label instead of dropdown select list) but behaves like "add user" - tries to add user from the label and fails because the user already exists.


Version-Release number of selected component (if applicable):
system-config-samba-1.2.41-3

How reproducible:
always

Steps to Reproduce:
1. add some-user via system-config-samba
2. edit some-user (no change is necessary, just confirm the edit window with ok button)
3. try to add another user 
  
Actual results:
window pops up, having "some-user" set as "Unix Username" without any way of changing it.


Expected results:
Normal "add user" window appears, just like at 1.

Additional info:
When you close the broken "add user" windows and try to repeat steps 2. and 3., it break even more:

Normal "add user" window appear but the dropdown list for unix user selection is overwritten by the label from "edit user" window.