Bug 36518 call hierarchy: 'refresh' should available only in dropdown menu
toolbar button is not conventional and not accessible we should remove it from there and put in the dropdown menu (context menu is ok, i guess)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyFiltersActionGroup.java
/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *   Jesper Kamstrup Linnet (eclipse@kamstrup-linnet.dk) - initial API and implementation 
 *          (report 36180: Callers/Callees view)
 ******************************************************************************/
package org.eclipse.jdt.internal.ui.callhierarchy;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.util.Assert;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.actions.ActionGroup;
import org.eclipse.jdt.internal.ui.JavaPluginImages;
/**
 * Action group to add the filter action to a view part's toolbar
 * menu.
 * <p>
 * This class may be instantiated; it is not intended to be subclassed.
 * </p>
 */
public class CallHierarchyFiltersActionGroup extends ActionGroup {