RFR: 8328004: Minor updates to TrayIcon test DisposeInActionEventTest.java

[Tejesh R]

On Tue, 12 Mar 2024 18:49:03 GMT, Phil Race <prr at openjdk.org> wrote:

> This was recently converted from a manual Applet to a PassFailJFrame main program
> But I see a few things that could be tweaked
>  - Clarify instructions
>  -  Set path to PassFailJFrame
>  - reduce timeout to default
>  - eliminate redundant folder

`textArea` can be moved inside `showFrameAndIcon()`.

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PR Review: https://git.openjdk.org/jdk/pull/18246#pullrequestreview-1933175995