Bug 36616 Call hierarchy: clicking Show History button should show dialog
When clicking the "Show History List" button (not the drop down arrow) nothing happens. To be consistent with search and the type hierarchy a dialog with the full list should be shown.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/HistoryDropDownAction.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.swt.widgets.Control;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ActionContributionItem;
import org.eclipse.jface.action.IMenuCreator;
import org.eclipse.ui.help.WorkbenchHelp;
import org.eclipse.jdt.core.IMethod;
import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
import org.eclipse.jdt.internal.ui.JavaPluginImages;
class HistoryDropDownAction extends Action implements IMenuCreator {