RFR: JDK-8015739: Background of JInternalFrame is located out of JInternalFrame [v8]

[Harshitha Onkar]

On Thu, 6 Oct 2022 14:13:25 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> Yes, that is correct.
>
> Will you update it to use `BORDER_THICKNESS`?

@aivanov-jdk I was waiting on testing results to make the final update along with the above change.

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PR: https://git.openjdk.org/jdk/pull/10274