java/awt/Dialog/FileDialogTest fails to hide the file dialog . I replaced hide() with setVisible(false) but still file dialog is hidden.

Step to reproduce
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1) Run java/awt/Dialog/FileDialog test or I have attached the same FileDialog test without PassFailJFrame framework.
2) Click on "Show FileDialog, then hide() in 5 s..." button. Wait for 5 seconds. The FileDialog should then disappear automatically.
If you dn't see FileDialog getting disappear automatically, then the bug is reproduced.