[jdk17u-dev] RFR: 8279337: The MToolkit is still referenced in a few places

[Martin Doerr]

Clean backport of [JDK-8279337](https://bugs.openjdk.java.net/browse/JDK-8279337).

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Commit messages:
 - Backport f203723fc72c5d92c8745d4c595f360a9b50c512

Changes: https://git.openjdk.org/jdk17u-dev/pull/2536/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2536&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8279337
  Stats: 117 lines in 18 files changed: 5 ins; 57 del; 55 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2536.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2536/head:pull/2536

PR: https://git.openjdk.org/jdk17u-dev/pull/2536