RFR: 8090123: Items are no longer visible when collection is changed [v2]

[Karthik P K]

On Fri, 17 Feb 2023 16:22:44 GMT, Karthik P K <kpk at openjdk.org> wrote:

>> Yes it should be `downArrow.isVisible()`. I'll update the code.
>
> While this is a simple change, I thought of adding more checks on the visibility of both up and down arrow in the test to avoid these types of error in code. I'm seeing a strange issue that, I'm getting failures when more than 4 `Assert.assertTrue/assertFalse` statements are added. I'll investigate more on this and then update the code.

Updated code and added more checks on visibility of up and down arrow in system test.

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PR: https://git.openjdk.org/jfx/pull/1039