[jdk8u-dev] RFR: 8274751: Drag And Drop hangs on Windows

[Sergey Bylokhov]

Hi all,
This pull request contains a backport of commit [7a0a6c95](https://github.com/openjdk/jdk/commit/7a0a6c95a53c6cb3340328d6543a97807320b740) from the [openjdk/jdk](https://git.openjdk.java.net/jdk) repository.
The commit being backported was authored by Dmitry Markov on 24 Jan 2022 and was reviewed by Alexey Ivanov, Phil Race and Sergey Bylokhov.
Thanks!

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Commit messages:
 - Backport 7a0a6c95a53c6cb3340328d6543a97807320b740

Changes: https://git.openjdk.java.net/jdk8u-dev/pull/23/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk8u-dev&pr=23&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274751
  Stats: 19 lines in 4 files changed: 2 ins; 0 del; 17 mod
  Patch: https://git.openjdk.java.net/jdk8u-dev/pull/23.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk8u-dev pull/23/head:pull/23

PR: https://git.openjdk.java.net/jdk8u-dev/pull/23