git: openjdk/jfx-sandbox: glass_gtk_bug_squashing: Improve tests

[duke]

Changeset: d142280a
Branch: glass_gtk_bug_squashing
Author:    Thiago Milczarek Sayao <thiago.sayao at gmail.com>
Date:      2025-04-17 08:28:58 +0000
URL:       https://git.openjdk.org/jfx-sandbox/commit/d142280adffcd499b47d35f479a77de533e7ae45

Improve tests

= tests/system/src/test/java/test/javafx/stage/MaximizeTests.java
! tests/system/src/test/java/test/robot/javafx/stage/StageAttributesTest.java