RFR: 8299756: Minor updates in CSS Reference [v3]

[Andy Goryachev]

> Minor fixes and addition of missing sections:
> 
> - The 'system' font is missing from the list of generic font family names in the <font> section. ✓
> - Explicitly add text color property -fx-fill to Text section, so as not to confuse with Labeled -fx-text-fill ✓
> - TextFlow section is missing, properties: -fx-text-alignment, -fx-line-spacing, -fx-tab-size ✓
> - Text: missing -fx-line-spacing, -fx-bounds-type ✓
> - -fx-focus-traversable is in Node and not in Control (though there is some relevant comment) - keep as is. ✓
> - Node: broken link to 'Control' (sic, not Controls) in "... see Controls for details" ✓
> - Missing <text-bounds-type> type ✓

Andy Goryachev has updated the pull request incrementally with one additional commit since the last revision:

  pane

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1144/files
  - new: https://git.openjdk.org/jfx/pull/1144/files/8a9aa465..81d0675d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1144&range=02
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1144&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jfx/pull/1144.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1144/head:pull/1144

PR: https://git.openjdk.org/jfx/pull/1144