Stop crash of AccessibleObject on GTK 4

GTK 4 port crashes on start up if worspace chooser has to be shown as
AccessibleObject is totally disfunctional on GTK 4.x version but later
on it tries to send events.
Disable it for now.

bundles/org.eclipse.swt/Eclipse SWT Accessibility/gtk/org/eclipse/swt/accessibility/AccessibleObject.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2018 IBM Corporation and others.
+ * Copyright (c) 2000, 2025 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -4655,6 +4655,7 @@ void selectionChanged () {
 	}
 
 	void sendEvent(int event, Object eventData) {
+		if(GTK.GTK4) return; //TODO reenable for GTK 4.x
 		switch (event) {
 			case ACC.EVENT_SELECTION_CHANGED:
 				OS.g_signal_emit_by_name (atkHandle, ATK.selection_changed);