Feature Request: macOS - Title Bar & Dark Color Theme #1055

Is it possible that the Title Bar switches to dark mode, if the "Dark Color Theme" is enabled via preferences?

Screenshot 1) Light Theme with light title bar <img width="1203" alt="macos_title_bar_light" src="https://user-images.githubusercontent.com/3995546/32366009-97cf29a8-c07c-11e7-8799-2496d4257dd8.png">

Screenshot 2) Dark Theme with light title bar <img width="1216" alt="macos_title_bar_dark" src="https://user-images.githubusercontent.com/3995546/32366022-a523e35a-c07c-11e7-9597-fbb25b667b6f.png">

Screenshot 3) Dark title bar in other Editor <img width="322" alt="title_bar_dark" src="https://user-images.githubusercontent.com/3995546/32366080-e21b37cc-c07c-11e7-816a-e946156533a3.png">