This PR extends the range of hi-res images that are loaded via naming convention, now including scale factors higher than "@2x". Supporting these is already being [recommended](https://developer.apple.com/design/human-interface-guidelines/images#Best-practices) for some platforms.
I tested this manually on Windows with "300%" UI scale factor, and verified "@x2" still works on macOS. ------------- Commit messages: - Add extended high-dpi image support Changes: https://git.openjdk.org/jfx/pull/1429/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1429&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8267565 Stats: 49 lines in 5 files changed: 19 ins; 0 del; 30 mod Patch: https://git.openjdk.org/jfx/pull/1429.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1429/head:pull/1429 PR: https://git.openjdk.org/jfx/pull/1429
