8350917: Allow parent nodes to provide CSS styleable properties for child nodes
------------- Commit messages: - Remove white space - Proof of concept parent provided styleable properties Changes: https://git.openjdk.org/jfx/pull/1714/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1714&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8350917 Stats: 579 lines in 6 files changed: 368 ins; 61 del; 150 mod Patch: https://git.openjdk.org/jfx/pull/1714.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1714/head:pull/1714 PR: https://git.openjdk.org/jfx/pull/1714
