[krbdev.mit.edu #5650] NIM GUI doesn't implement expected Windows behavior

[Kevin Koch via RT]

NIM 3.2.x.
Menu Options | Identities; then click "Add new identity ..."
Type in a username.  With focus on the username field, type <ENTER>.
The "Add new identity" dialog closes and the identity is not added.
I suspect the default action for the "Add new identity" dialog has not 
been set.