#20 Another editor close bug

[Stephen Crawley]

The problem occurs in the following scenario:

1) Use File>New to create an editor
2) Type some characters, and then click on the
editor's close button
3) In the "Do you want to save ..." dialog, click "No".

The editor frame disappears, but the File menu still
allows you to select File>Close. And when you do, you
get a dialog asking you if you want to save the changes
for the editor created in 1) above!