RFR: 8345348: CSS media feature queries [v12]

[Michael Strauß]

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

Michael Strauß has updated the pull request incrementally with one additional commit since the last revision:

  small refactor

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/1655/files
  - new: https://git.openjdk.org/jfx/pull/1655/files/c39aa537..51d26f71

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1655&range=11
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1655&range=10-11

  Stats: 40 lines in 5 files changed: 18 ins; 17 del; 5 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