I like it better with the space in between. Normally I'm used to not
using spaces, but since you can here, do it.

Following this guide to rename the project:
https://digitalleaves.com/blog/2017/06/rename-xcode-project/

Not yet finished, but committing this stage of the rename now.

Since we had removed the action in
b44d11312c8dd908a8e6d3c83e8f9773a893e15c, clicking on "Quit" didn't do
anything. Re-enable the button so that it correctly quits the app when
clicked once again.

Previously I only had a key equivalent on the "Escape" key because you
can only set a single key equivalent. But I wanted the "Quit" button to
work on both "Escape" and "q" presses.

I tried to do this by overriding `performKeyEquivalent:`:

    - (BOOL)performKeyEquivalent:(NSEvent *)theEvent
    {
        if ([[theEvent characters] isEqualToString:@"q"] ||
            [theEvent keyCode] == kVK_Escape) {
        NSLog(@"%@", theEvent);
            return YES;
        }

        return [super performKeyEquivalent:theEvent];
    }

The method was called and it logged correctly, but the `IBAction`
wouldn't run. Maybe this doesn't work for what I want it to? Can't
figure out what the problem is.

Didn't want to deal any more so just overrode `keyDown:` instead and got
rid of the `IBAction`, just terminating the application in code.

These debug logs are no longer necessary now that we know that it works.

No longer planning on using this method. Ideally there would be a way to
save and restore the old default "mailto" handler bundle identifier,
but that's just too much of a pain and I don't want to bother.

Once the email is copied, the application has exhausted its usefulness
and should just quit as if it were a dialog.

Fix this warning:

    warning: Attribute Unavailable: System Font Weights other than
    Regular or Bold before OS X 10.11