RFR: 8295774 : Write a test to verify that List Item selection events.

[Sergey Bylokhov]

On Fri, 28 Oct 2022 09:01:53 GMT, ravi gupta <duke at openjdk.org> wrote:

> This testcase verify that List Item selection via mouse/keys generates ItemEvent/ActionEvent appropriately.
> 
> a. Single click on the list generate ItemEvent and double click on item generates ActionEvent.
> b. UP/DOWN keys on the list generate ItemEvent and enter key on item generates ActionEvent.
> 
> Testing:
> Tested using Mach5(20 times per platform) in macos,linux and windows and got all pass.

Marked as reviewed by serb (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/10899