<AWT Dev> RFR: [12] JDK-8211301: [macos] support full window content options

[Alan Snyder]

A reminder...

> 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
>