[10] Review request: 8195075: Old app window is not reactivatable

[Alexey Semenyuk]

Victor,

Please review my changes for fixing the issue: "JDK-8195075: Old app 
window is not reactivatable"

JIRA: https://bugs.openjdk.java.net/browse/JDK-8195075
Webrev: http://cr.openjdk.java.net/~asemenyuk/8195075/webrev.00/

- Alexey