Merge branch '22-jdk-9-is-not-supported' into 'master'

.gitlab-ci.yml

Dockerfile

sb/.classpath

sb/.settings/org.eclipse.jdt.core.prefs

sb/META-INF/MANIFEST.MF

sb/pom.xml

.../java/com/oracle/javafx/scenebuilder/app/AppPlatform.java

...cle/javafx/scenebuilder/app/DocumentWindowController.java

...om/oracle/javafx/scenebuilder/app/ResourceController.java

...a/com/oracle/javafx/scenebuilder/app/SceneBuilderApp.java

.../com/oracle/javafx/scenebuilder/app/SceneBuilderTest.java

...avafx/scenebuilder/app/SceneStyleSheetMenuController.java

...cle/javafx/scenebuilder/app/UpdateSceneBuilderDialog.java

.../javafx/scenebuilder/app/about/AboutWindowController.java

...le/javafx/scenebuilder/app/menubar/MenuBarController.java

...x/scenebuilder/app/preferences/PreferencesController.java

...enebuilder/app/preferences/PreferencesRecordDocument.java

...scenebuilder/app/preferences/PreferencesRecordGlobal.java

...ebuilder/app/preferences/PreferencesWindowController.java

...uilder/app/registration/RegistrationWindowController.java