Implementation of [CSS media queries](https://gist.github.com/mstr2/cbb93bff03e073ec0c32aac317b22de7).
------------- Commit messages: - Add persistentScrollBars media feature - Merge branch 'master' into feature/media-queries - Merge branch 'master' into feature/media-queries - Implementation of media queries Changes: https://git.openjdk.org/jfx/pull/1655/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1655&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8345348 Stats: 4607 lines in 37 files changed: 3510 ins; 1026 del; 71 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
