RFR: 8320359: ImageView: add styleable fitWidth, fitHeight, preserveRatio, smooth properties

[Andy Goryachev]

Adding missing styleable properties to ImageView:


-fx-preserve-ratio
-fx-smooth
-fx-fit-width
-fx-fit-height


Updated CSS Reference.

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Commit messages:
 - cleanup
 - cleanup
 - css util
 - Merge remote-tracking branch 'origin/master' into 8320359.image.view.css
 - Merge remote-tracking branch 'origin/master' into 8320359.image.view.css
 - no nulls
 - styleable
 - name
 - node
 - whitespace
 - ... and 1 more: https://git.openjdk.org/jfx/compare/d65d8a65...49e5bc68

Changes: https://git.openjdk.org/jfx/pull/1293/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1293&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320359
  Stats: 239 lines in 4 files changed: 182 ins; 18 del; 39 mod
  Patch: https://git.openjdk.org/jfx/pull/1293.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1293/head:pull/1293

PR: https://git.openjdk.org/jfx/pull/1293