[jfx21] RFR: 8313227: Correct attenuation indicator for removed lights

[Nir Lisker]

Backport of commit [b323db26](https://github.com/openjdk/jfx/commit/b323db262906853afbdec7a747f3b2f5b6593b9b) (PR https://github.com/openjdk/jfx/pull/1186)

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Commit messages:
 - Backport b323db262906853afbdec7a747f3b2f5b6593b9b

Changes: https://git.openjdk.org/jfx/pull/1187/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1187&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8313227
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jfx/pull/1187.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1187/head:pull/1187

PR: https://git.openjdk.org/jfx/pull/1187