Enable keyboard hotkeys for Close File dialog

This is a minor functionality tweak, but it would be great to have hotkeys for the Close File dialog that duplicate similar applications' functionality. Here's the Sublime Text dialog in question:

Here are the hotkeys I propose:

d - Same as clicking "Don't Save"

c - Same as clicking "Cancel"

s - Same as clicking "Save"

Here's the same Photoshop dialog for which the above hotkeys function properly:

Why make this change? It's much more friendly to keyboard-users who use Cmd+W to quickly close multiple open files.

Thanks for the consideration!