RFR: 8377904: Replace Double.parseDouble() with CssNumberParser [v2]

[Michael Strauß]

> Replace occurrences of `Double.parseDouble()` with `CssNumberParser.parseDouble()` in CSS-related code.
> 
> As with #2069, the specification of JavaFX CSS is not changed.
> 
> There are no new tests, because the existing tests already cover all affected code paths.

Michael Strauß has updated the pull request incrementally with one additional commit since the last revision:

  review comments

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Changes:
  - all: https://git.openjdk.org/jfx/pull/2087/files
  - new: https://git.openjdk.org/jfx/pull/2087/files/fcce57af..3acf5497

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=2087&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=2087&range=00-01

  Stats: 32 lines in 4 files changed: 14 ins; 3 del; 15 mod
  Patch: https://git.openjdk.org/jfx/pull/2087.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/2087/head:pull/2087

PR: https://git.openjdk.org/jfx/pull/2087