Bug 182661 Cross Tab: Need to support "New Data Cube" from menu bar
Please look at the UI mockup as reference to support "New Data Cube" on dropdown menu from Menu bar.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/DesignerActionBarContributor.java
/*************************************************************************************
 * Copyright (c) 2004 Actuate Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http:www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 * Actuate Corporation - Initial implementation.
 ************************************************************************************/
package org.eclipse.birt.report.designer.internal.ui.editors;
import java.util.Iterator;
import java.util.List;
import org.eclipse.birt.report.designer.core.model.SessionHandleAdapter;
import org.eclipse.birt.report.designer.internal.ui.command.CommandUtils;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.AddGroupAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.AddStyleAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.CreatePlaceHolderPartAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.InsertColumnLeftAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.InsertColumnRightAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.InsertRowAboveAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.InsertRowBelowAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.MergeAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.RevertToReportItemPartAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.SplitAction;