Hello there.
It might be logical to implement this improvements into WG:
1.In the users list there are 2 main type of users: enabled and disabled.
Impossible to understand type of user without opening his properties.
Might be good to change icon of user or add a some symbol for indicate disabled user in the list. As a result, look on list (where may be 100, 200 or more users) and see which are enabled or not. Simple.
2.When "authentication failed" WG automatically switch on System messages pane. It's bad, because in a case where this errors are infinite I can't fix on another panes. WG switch and switch again. Not so good behavior. Isn't it?