[jfx11u] RFR: 8211294: ScrollPane content is blurry with 125% scaling

[Johan Vos]

Clean backport for jfx11u . Builds and tests are green.

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Commit messages:
 - 8211294: ScrollPane content is blurry with 125% scaling

Changes: https://git.openjdk.java.net/jfx11u/pull/16/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx11u&pr=16&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8211294
  Stats: 161 lines in 3 files changed: 136 ins; 12 del; 13 mod
  Patch: https://git.openjdk.java.net/jfx11u/pull/16.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx11u pull/16/head:pull/16

PR: https://git.openjdk.java.net/jfx11u/pull/16