[MonoDevelop] Closing modified files

[Jacob Ilsø Christensen]

Hi.

I am working on a quick patch which adds a cancel button to the dialog
you get when closing a modified file. Currently AskQuestion is used
which returns a bool. I would like the new method to return a
Gtk.ResponseType, but this would make MonoDevelop.Core
(IMessageService) reference the Gtk assembly. Do we want this
reference?

/Jacob