RFR: 8345348: CSS Media Queries [v3]

[Michael Strauß]

> Implementation of [CSS media queries](https://gist.github.com/mstr2/cbb93bff03e073ec0c32aac317b22de7).

Michael Strauß has updated the pull request incrementally with two additional commits since the last revision:

 - revert import
 - move scene preferences to Scene.Preferences interface

-------------

Changes:
  - all: https://git.openjdk.org/jfx/pull/1655/files
  - new: https://git.openjdk.org/jfx/pull/1655/files/f6875179..efd176d8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1655&range=02
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1655&range=01-02

  Stats: 685 lines in 6 files changed: 440 ins; 211 del; 34 mod
  Patch: https://git.openjdk.org/jfx/pull/1655.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1655/head:pull/1655

PR: https://git.openjdk.org/jfx/pull/1655