RFR: 8345348: CSS Media Queries [v7]

[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/e214d5cc..7826fc18

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1655&range=06
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1655&range=05-06

  Stats: 30 lines in 5 files changed: 19 ins; 6 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