[8] Request for review: 7150100 [macosx] "0123456789" is selected in the TextField.

[Sergey Bylokhov]

Hi Everyone,
Two issues resolved:
1) We should set caret position before the text selection.
2) On macosx we clear selection when the test component lost its focus, 
so test was simplified and instructions dialog was removed (because 
sometimes it steal the focus from the text component)

Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7150100 **
Webrev can be found at: http://cr.openjdk.java.net/~serb/7150100/webrev.00/

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Best regards, Sergey.