Change field types from LinkedHashSet back to HashSet to retain binary compatibility (#11432)

svn changeset:25964/svn branch:6.8

Change-Id: Iddf0fa7de10a788e1a51e006e92ed3976a39a30b

server/src/com/vaadin/event/ActionManager.java

@@ -15,6 +15,7 @@
  */
 package com.vaadin.event;
 
+import java.util.HashSet;
 import java.util.LinkedHashSet;
 import java.util.Map;
 
@@ -43,11 +44,15 @@ public class ActionManager implements Action.Container, Action.Handler,
 
     private static final long serialVersionUID = 1641868163608066491L;
 
-    /** List of action handlers */
-    protected LinkedHashSet<Action> ownActions = null;
+    /**
+     * List of action handlers. Guaranteed to keep the original insertion order.
+     */
+    protected HashSet<Action> ownActions = null;
 
-    /** List of action handlers */
-    protected LinkedHashSet<Handler> actionHandlers = null;
+    /**
+     * List of action handlers. Guaranteed to keep the original insertion order.
+     */
+    protected HashSet<Handler> actionHandlers = null;
 
     /** Action mapper */
     protected KeyMapper<Action> actionMapper = null;