[jdk15u-dev] Integrated: 8258373: Update the text handling in the JPasswordField

[Yuri Nesterenko]

This improvement in JPasswordField handling should be ported here as well. Patch goes without adjustments. Tested with automated swing regression tests.

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Commit messages:
 - Backport 7afb01dce966e4c00880711ef232af12af755b3a

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/84/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=84&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258373
  Stats: 393 lines in 7 files changed: 392 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk15u-dev/pull/84.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/84/head:pull/84

PR: https://git.openjdk.java.net/jdk15u-dev/pull/84