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

[duke]

Changeset: ad731ba8
Branch: glass_gtk_bug_squashing
Author:    Thiago Milczarek Sayao <thiago.sayao at gmail.com>
Date:      2025-04-08 09:09:59 +0000
URL:       https://git.openjdk.org/jfx-sandbox/commit/ad731ba81bd3316156af8cb478cf074fa5f2f872

Improve testing

! modules/javafx.graphics/src/main/java/com/sun/glass/ui/gtk/GtkWindow.java
+ tests/system/src/test/java/test/javafx/stage/StageChangePropertiesWhileNotFloatingTest.java
- tests/system/src/test/java/test/javafx/stage/StageRestorePropertiesTest.java
+ tests/system/src/test/java/test/javafx/stage/StageTestBase.java