RFR: 8355012: JavaFX modena.css -fx-highlight-text-fill bug [v3]

[Ziad El Midaoui]

> The issue was happening because `-fx-highlight-text-fill` was set to white , so when the background color is bright (>60% brightness ) the text is not visible , the solution is to change the value to be dynamically set depending on the level of brightness of the background this is done by `-fx-focused-text-base-color` .

Ziad El Midaoui has updated the pull request incrementally with two additional commits since the last revision:

 - Added standard copyright, javadoc and changed file name to TextInputControlModenaTest
 - Added standard copyright, javadoc and changed file name to TextInputControlModenaTest

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1801/files
  - new: https://git.openjdk.org/jfx/pull/1801/files/50627c42..7320ee66

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1801&range=02
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1801&range=01-02

  Stats: 237 lines in 2 files changed: 139 ins; 98 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1801.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1801/head:pull/1801

PR: https://git.openjdk.org/jfx/pull/1801