Request for review: 7125657 [macosx] SpreadSheet demo has the broken display when clicking outside of the table

[Sergey Bylokhov]

Hi Everyone,
There is no reason to paint native part of the peer on Update event.
Note that we paint it in the XToolkit but most of the code(and this 
demo) is working, because XPanel.paintPeer is noop.

Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7125657
Webrev can be found at: http://cr.openjdk.java.net/~serb/7125657/webrev.00

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Best regards, Sergey.