[8u] Review request for 8169777: MenuBar unoperable after moving Application to second monitor

[Jim Graham]

This is essentially a backport request for the fix for JDK-8160073, but a modification of the fix was needed as the code 
changed between 8u and 9.

JBS: https://bugs.openjdk.java.net/browse/JDK-8169777
webrev: http://cr.openjdk.java.net/~flar/JDK-8169777/webrev.00/

I tested on Win10 and it works fine, though the platform support for DPI scaling on Win8 (pre-8.1) and Win7 was 
different than their handling on Win10 so a test run of the test case on Win7 and/or Win8.0 would be helpful for sanity. 
  Unfortunately my Win7 boot partition is buried in a cesspool of permission issues trying to run the test build... :(

				...jim