This test case tests the functionality of `setAlwaysOnTop`. Documentation on `setAlwaysOnTop`: [Link](https://docs.oracle.com/en/java/javase/17/docs/api/java.desktop/java/awt/Window.html#setAlwaysOnTop(boolean))
The following test case was seen to fail on windows and linux platforms. With the proposed fix, the test case works on all platforms. The test case tests `alwaysOnTop` for the following three cases: 1. JDialog with no parent/owner 2. JDialog with JFrame as owner 3. JDialog with another JDialog as owner Each of the three cases mentioned above is tested under 3 scenarios:  ------------- Commit messages: - test case changes for alwaysOnTop Changes: https://git.openjdk.java.net/jdk/pull/8509/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8509&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8222323 Stats: 203 lines in 2 files changed: 106 ins; 9 del; 88 mod Patch: https://git.openjdk.java.net/jdk/pull/8509.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8509/head:pull/8509 PR: https://git.openjdk.java.net/jdk/pull/8509
