To reproduce, go:
* File -> New -> Contact, and the "Contact Editor" dialog box opens.
* Click the "Full name" button, and the "Full name" dialog box opens.
* In the "First:" field, type "first".
* In the "Last:" field, type "last".
* Click "OK" to close the "Full name" dialog box.
* Observe that the window name is now "Contact Editor - last, first"
* Change the "File under" value to "first last".
* Observe that the window name now changes to "Contact Editor - first last", which is great!
* Click "OK" to close this contact.
* Now open up the contact we just closed, and observe the window name.

What happens:
* The window name has reverted back to: "Contact Editor - last, first".

What should happen:
* The window name should be "Contact Editor - first last" (i.e. it should use the "File under" field, in the same way that it does when creating the contact).

Other information: