RFR: 6852577: Only for Nimbus LAF UIManager.get("PasswordField.echoChar") is null [v4]

[Prasanta Sadhukhan]

> Default echo character obtained through `PasswordField.echoChar` UIProperty returns null for Nimbus L&F,
> which is fixed by adding the default character * in the UIDefault table.

Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:

  Review comment fix

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10035/files
  - new: https://git.openjdk.org/jdk/pull/10035/files/63998b9c..ae363d2d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10035&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10035&range=02-03

  Stats: 18 lines in 2 files changed: 7 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/10035.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10035/head:pull/10035

PR: https://git.openjdk.org/jdk/pull/10035