<AWT Dev> [8] Review Request: 8027479 [macosx] Appletviewer is broken after the fix 8014718

[Sergey Bylokhov]

Hello.
Please review the fix for jdk 8. fix will be backported to 7u-dev.
The problem is that appletviewer and applet have different appcontext, 
and when we postEvent to the applet inside appletviwer we reuse 
appconext from lwwindowpeer which is bound to appletviwer's appcontext.
I reuse  LWToolkit.postEvent, which gets appcontext from the source of 
the event.

Bug: https://bugs.openjdk.java.net/browse/JDK-8027479
Webrev can be found at: http://cr.openjdk.java.net/~serb/8027479/webrev.00

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Best regards, Sergey.