[jdk17u-dev] RFR: 8297923: java.awt.ScrollPane broken after multiple scroll up/down

[Goetz Lindenmaier]

This backports 8297923 and its two follow ups.
All three apply clean, except of a Copyright fix in WScrollPanePeer.java in 8310054.

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Commit messages:
 - Backport 8311689 - clean
 - Backport 8310054 - resolve Copyright
 - Backport 8297923 - clean

Changes: https://git.openjdk.org/jdk17u-dev/pull/1578/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1578&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297923
  Stats: 17 lines in 3 files changed: 7 ins; 1 del; 9 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1578.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1578/head:pull/1578

PR: https://git.openjdk.org/jdk17u-dev/pull/1578