[jdk13u-dev] RFR: 8260616: Removing remaining JNF dependencies in the java.desktop module

[Vladimir Kempik]

not a clean backport from 15u to 13u. main points:

some context code differences
getMultiClickTime missing on jdk13
white space patches in CGLGraphicsConfig.m not needed in 13

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Commit messages:
 - 8260616: Removing remaining JNF dependencies in the java.desktop module

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/178/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=178&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260616
  Stats: 569 lines in 73 files changed: 241 ins; 98 del; 230 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/178.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/178/head:pull/178

PR: https://git.openjdk.java.net/jdk13u-dev/pull/178