RFR: 8u backport of JDK-8211301 [macos] support full window content options

[Andreas Ahlenstorf]

Hi!

The backport adds support for the two properties

apple.awt.fullWindowContent
apple.awt.transparentTitleBar

that make the content view extend into the window's title bar on macOS. The 11u patch didn't apply cleanly to 8u, so I copied it over manually. I didn't have to make any material changes.

Original CSR: https://bugs.openjdk.java.net/browse/JDK-8242566
Backport bug: https://bugs.openjdk.java.net/browse/JDK-8211301
Webrev: https://cr.openjdk.java.net/~sgehwolf/webrevs/aahlenstorf/JDK-8211301/01/webrev/ 

Thanks,
Andreas