[jdk17u-dev] RFR: 8327754: Convert javax/swing/JPopupMenu/7160604/bug7160604.java applet to main

[Goetz Lindenmaier]

I backport this for parity with 17.0.17-oracle.

-------------

Commit messages:
 - Backport 628e7702746ed4cc899d9727432b64c701533eb3

Changes: https://git.openjdk.org/jdk17u-dev/pull/3660/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3660&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327754
  Stats: 237 lines in 3 files changed: 112 ins; 125 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3660.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3660/head:pull/3660

PR: https://git.openjdk.org/jdk17u-dev/pull/3660