This test NullModalityDialogTest.java was failing repeatedly on macos in automated testing citing "Tab navigation did not happen properly". Modified to use invokeAndWait() instead of invokeLater and also use setAutoDelay() with appropriate delay time, in consistent with other automated tests running on mach5. Several iterations of the test works fine in all platforms after this modification.
------------- Commit messages: - 8233565: [TESTBUG] NullModalityDialogTest.java fails on MacOS Changes: https://git.openjdk.java.net/jdk/pull/3488/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3488&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8233565 Stats: 7 lines in 2 files changed: 3 ins; 1 del; 3 mod Patch: https://git.openjdk.java.net/jdk/pull/3488.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/3488/head:pull/3488 PR: https://git.openjdk.java.net/jdk/pull/3488
