RFR: 8327492: Remove applet usage and update DisposeInActionEventTest.html [v11]

[Alisen Chung]

On Thu, 7 Mar 2024 16:37:25 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> On windows you need to left click twice, on macos you need to right click once
>
> [I did suggest clearer instructions](https://github.com/openjdk/jdk/pull/17838#discussion_r1506056726):
> 
>                         clickInstruction + " on the tray icon to trigger the\n" +
> 
> You ignored it and marked resolved.
> 
> In the current instructions, _“the button”_ does not refer to anything obvious. What button? It's confusing. Remove _“the button”_ from the instructions, and the instructions are clear: _“Right-click / Double-click on **the tray icon**…”_

I've also added left mouse button in parenthesis for windows, is it unnecessary? I think it should be clear now

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PR Review Comment: https://git.openjdk.org/jdk/pull/17838#discussion_r1516507424