RFR: JDK-8316781 Fix legal and monarch paper sizes

[John Hendrikx]

The sizes should be 8.5 wide for letter, and 3.875 wide for monarch.

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Commit messages:
 - Fix legal and monarch paper sizes

Changes: https://git.openjdk.org/jfx/pull/1248/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1248&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316781
  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jfx/pull/1248.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1248/head:pull/1248

PR: https://git.openjdk.org/jfx/pull/1248