[TxMt] small feature request: keyboard shortcut for "Don't Save"

[Stephen Bannasch]

I often end up with a large number of untitled files that I sequence through when I am done working. Some I save but many I 
just review and close. It would be great to have a keyboard shortcut for the "Don't Save" option in dialogs like this:

    Do you want to save the changes you made in
    the document "untitled 25"?"

     "Don't Save"      "Cance;"        "Save"

Very occasionally I have also lost access to the mouse while having many windows open. These windows consist of some that need 
to be saved and some that should just be discarded. When I do not have access to the mouse I have to save EVERY window in order 
to complete an orderly Quit of Textmate. A keyboard shortcut for "Don't Save" would be particularly useful here.