RFR: 8190264: JScrollBar ignores its border when using macOS Mac OS X Aqua look and feel [v12]

[Alisen Chung]

> Adjusted the AquaLF scrollbar to account for border inset settings when dragging the thumb and clicking on the track.

Alisen Chung has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 16 additional commits since the last revision:

 - Merge branch 'master' of github.com:alisenchung/jdk into 8190264
 - updated test
 - added check for other L&Fs, added newline to test
 - removed todo comment
 - finished test
 - fixed test 2
 - fixed test
 - need to fix comparison of BufferedImages
 - removed robot mouse moves, use pixel colors to check
 - removed manual tag
 - ... and 6 more: https://git.openjdk.java.net/jdk/compare/fd0217b8...ee57b8ac

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6374/files
  - new: https://git.openjdk.java.net/jdk/pull/6374/files/0a6283bd..ee57b8ac

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6374&range=11
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6374&range=10-11

  Stats: 965758 lines in 3134 files changed: 508319 ins; 438352 del; 19087 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6374.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6374/head:pull/6374

PR: https://git.openjdk.java.net/jdk/pull/6374