RFR: 8228867: Fix mistakes in FX API docs

[Nir Lisker]

Docs fixes for OpenJFX 14. We can wait with integrating this in case there are last minute fixes, but reviews can start.

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Commits:
 - 25c6f63b: Merge remote-tracking branch 'origin/jfx14' into JDK-8228867_Fix_mistakes_in_FX_API_docs
 - 5425c80a: Fixes for Animation
 - c067e088: Initial commit of 8228867

Changes: https://git.openjdk.java.net/jfx/pull/110/files
 Webrev: https://webrevs.openjdk.java.net/jfx/110/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8228867
  Stats: 6 lines in 5 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jfx/pull/110.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/110/head:pull/110

PR: https://git.openjdk.java.net/jfx/pull/110