[jdk21] RFR: 8311689: Wrong visible amount in Adjustable of ScrollPane

[Phil Race]

On Tue, 11 Jul 2023 14:47:58 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

> This is a clean backport of [JDK-8311689](https://bugs.openjdk.org/browse/JDK-8311689) which is a regression from [JDK-8297923](https://bugs.openjdk.org/browse/JDK-8297923).
> 
> ---
> 
>> This pull request contains a backport of commit [b3f34039](https://github.com/openjdk/jdk/commit/b3f34039fedd3c49404783ec880e1885dceb296b) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
>> 
>> The commit being backported was authored by Alexey Ivanov on 11 Jul 2023 and was reviewed by Phil Race, Harshitha Onkar and Sergey Bylokhov.
> 
> @prrace @honkar-jdk @mrserb

Marked as reviewed by prr (Reviewer).

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PR Review: https://git.openjdk.org/jdk21/pull/111#pullrequestreview-1524764598