Bug 183888 BIRT designer - Cube in data explorer
Current behavior - The data explorer view allows uer to change the order of a group level in a hierrachy. Expected behavior - user should not be allowed to change the order of the group level in data explorer view. - Instead user can user cube builder dialog to change the order.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
* Operates elements. Operation type includes move or copy. Includes
	 * transaction.
	 * 
	 * @param transferData
	 *            single or multiple transfer data, every data must be an
	 *            instance of <code>DesignElementHandle</code> or
	 *            <code>DesignElement</code>
	 * @param targetObj
	 *            target elements, class type could be
	 *            <code>DesignElementHandle</code>,<code>SlotHandle</code>
	 *            or <code>ReportElementModel</code>
	 * @param position
	 *            the position will be added
	 * @param commandName
	 * @param commandType
	 *            TYPE_CUT or TYPE_COPY
	 * @return if succeeding in operating data
	 */
	protected static boolean operateHandles( Object transferData,
			Object targetObj, int position, String commandName,
			String commandType )
	{
		ModuleHandle designHandle = SessionHandleAdapter.getInstance( )
				.getReportDesignHandle( );
		CommandStack stack = designHandle.getCommandStack( );
		try
		{
			stack.startTrans( commandName );
			CompoundCommand commands = new CompoundCommand( );
			if ( transferData instanceof StructuredSelection )