RFR: 8361387 : Test bug4655513.java fails intermittently on Windows platform. [v3]

[Tejesh R]

On Tue, 26 Aug 2025 05:03:06 GMT, Anass Baya <abaya at openjdk.org> wrote:

>> This test was recently automated and is failing intermittently in the CI due to timing issues.
>> This enhancement aims to stabilize the test and also adds the missing null pointer check.
>
> Anass Baya has updated the pull request incrementally with one additional commit since the last revision:
> 
>   add waitForIdle()

`import java.awt.event.MouseEvent;` can be removed.

-------------

PR Review: https://git.openjdk.org/jdk/pull/26824#pullrequestreview-3164598279