I only did a very simple thing today, but it'll aid me in testing. When the "Do you want to save..." dialog shows up, it has three buttons. The default is mapped to return/enter, cancel to escape, but the don't save one (which I'll most likely be using when testing has to be clicked manually). To get rid of this annoyance, I added a check in the custom dialog filter, to see if the the key being hit equaled the first letter of the third button, and if it did to simulate a click there. So now I can just hit the D key to click the "Don't Save" button. Very small, but otherwise when quitting i'd have to click thet button for each open editor.