[macos] The two Regression manual tests failed as the margin can't be modified

Testsuite name: Regression manual
Test name(s): java/awt/print/PrinterJob/PageDialogMarginTest.java
Product(s) tested: JDK 11.0.1 b06 (64bit)
OS/architecture: Mac10.13 x64/Jtreg4.2b13

Issue is:
Actual behavior:
The right and bottom data in margin area can't be modified.

The following case has the same issue:
java/awt/print/PrinterJob/PageDialogMarginValidation.java

Actual behavior:
The top data in margin area can't be modified.