RFR: 8273478: [macos11] JTabbedPane selected and pressed tab is not legible

[Prasanta Sadhukhan]

On macOS 11 (bigsur), using the Swing Aqua Look and Feel,
the text of the selected and "pressed" JTabbedPane tab title text is just a light gray outline of white text on a white background which is not readable. 
Fix is to use selectedControlTextColor for TabbedPane.selectedTabTitlePressedColor same as what we use for TabbedPane.selectedTabTitleNormalColor. Result is black over white text same as what is seen for native app pressed tabbedpane.

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Commit messages:
 - 8273478: [macos11] JTabbedPane selected and pressed tab is not legible

Changes: https://git.openjdk.java.net/jdk/pull/5409/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5409&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273478
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5409.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5409/head:pull/5409

PR: https://git.openjdk.java.net/jdk/pull/5409