Bug fix rules dialog, possibly due to JavaFX18

Author: georgweiss

app/display/editor/src/main/java/org/csstudio/display/builder/editor/properties/RulesDialog.java

@@ -81,7 +81,7 @@
 public class RulesDialog extends Dialog<List<RuleInfo>>
 {
     /** Expression info as property-based item for table */
-    private abstract static class ExprItem<T>
+    public abstract static class ExprItem<T>
     {
         final protected StringProperty boolExp = new SimpleStringProperty();
         final protected SimpleObjectProperty<Node> field = new SimpleObjectProperty<>();
@@ -223,7 +223,7 @@ public static <T> ExprItem<?> makeNewFromOld(
     }
 
     /** Modifiable RuleInfo */
-    private static class RuleItem
+    public static class RuleItem
     {
         public List<ExprItem<?>> expressions;
         public List<PVTableItem> pvs;