<Swing Dev> RFR: 8251377: [macos11] JTabbedPane selected tab text is barely legible [v3]

[Prasanta Sadhukhan]

> On macOS 11 (bigsur) beta, using the Swing Aqua Look and Feel, the text of the selected JTabbedPane tab title text is just a light gray outline of white text on a white background. The macOS 11 design inverted from dark background / light text to light background / dark text, 
> Proposed fix is to use dark color in light background so I used lightGray instead of "white" which is being used now, if we are on BigSur.

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

  Use proper apple UI Element color

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/1182/files
  - new: https://git.openjdk.java.net/jdk/pull/1182/files/f06c1d70..ae1ba951

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1182&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1182&range=01-02

  Stats: 4 lines in 3 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1182.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1182/head:pull/1182

PR: https://git.openjdk.java.net/jdk/pull/1182