RFR: 8344914: OOME in several tests since JDK-6672644 - JComboBox still scrolling

[Phil Race]

On Sun, 24 Nov 2024 07:01:14 GMT, Damon Nguyen <dnguyen at openjdk.org> wrote:

> Backout for https://github.com/openjdk/jdk/pull/20845. Removes additions to `BasicScrollBarUI` and removes the test `JComboBoxScrollFocusTest`. Original PR caused some tests to fail that indicate a memory leak.
> 
> Ran clientlibs job in CI, and all relevant tests pass (including the few tests that were failing from the original PR).

Marked as reviewed by prr (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/22346#pullrequestreview-2456656371