RFR: [12] JDK-8211301: [macos] support full window content options

[Alan Snyder]

Please review the following change to the macOS AWT:

Bug: https://bugs.openjdk.java.net/browse/JDK-8211301
Revision: http://cr.openjdk.java.net/~alans/8211301/webrev.00/

This change allows applications on macOS to configure windows to use the full 
window content view option and the transparent title bar option.

If approved, I will need a sponsor…

Thank you.

  Alan